diff --git a/Makefile.in b/Makefile.in
deleted file mode 100644
index d1fc1764699231231ef98afb5bf0ae733f66d14d..0000000000000000000000000000000000000000
--- a/Makefile.in
+++ /dev/null
@@ -1,763 +0,0 @@
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diff --git a/src/.settings/language.settings.xml b/src/.settings/language.settings.xml
deleted file mode 100644
index 527fb011044a60d3943527299156f9d5de8be1d0..0000000000000000000000000000000000000000
--- a/src/.settings/language.settings.xml
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<project>
-	<configuration id="cdt.managedbuild.toolchain.gnu.macosx.base.481822517" name="Default">
-		<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
-			<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
-			<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
-			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuildCommandParser" id="org.eclipse.cdt.managedbuilder.core.GCCBuildCommandParser" keep-relative-paths="false" name="CDT GCC Build Output Parser" parameter="(g?cc)|([gc]\+\+)|(clang)" prefer-non-shared="true"/>
-			<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="-1667358530298693438" id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
-				<language-scope id="org.eclipse.cdt.core.gcc"/>
-				<language-scope id="org.eclipse.cdt.core.g++"/>
-			</provider>
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-		</extension>
-	</configuration>
-</project>
\ No newline at end of file
diff --git a/src/FqBaseBackend.cpp b/src/FqBaseBackend.cpp
index fd55744ca9cf9b0244491eb84cb17f61d16296c3..59013d754f882113e9d02e26f160ccd3563ccb23 100644
--- a/src/FqBaseBackend.cpp
+++ b/src/FqBaseBackend.cpp
@@ -83,14 +83,7 @@ void FqBaseBackend::openOutputFile(){
     openFile4Output(o_filename,&o_f_desc);
 }
 
-/*
-void FqBaseBackend::openUndefFile(){
-  //std::cout<<qual_thres.min_correct_k_mers_in_read<<endl;
-  if (qual_thres.min_correct_k_mers_in_read>=1) {
-    if (undef_filename==NULL) throw std::runtime_error("No file currently associated to this backend for undefined reads.");
-    openFile4Output(undef_filename,&undef_f_desc);
-  }
-}*/
+
 
 void FqBaseBackend::openFile4Output(char * filename, int * f_desc) {
     mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
@@ -119,39 +112,6 @@ void FqBaseBackend::closeOutputFile() {
     }
 }
 
-/*void FqBaseBackend::closeUndefFile() {
-    if (undef_f_desc!=-1) {
-        if (close(undef_f_desc)==-1) err(errno,"cannot close file: %s.",undef_filename);
-        undef_f_desc=-1;
-    }
-}*/
-
-/*
-void FqBaseBackend::writeStrToUndefFile(char * start_in_buf, int len) {
-    if (write(undef_f_desc,start_in_buf,len)==-1) err(errno,"cannot write in file: %s.",undef_filename);
-}*/
-
-/*
- * Writes a fq record to the file containing "undefined" reads.
- * Undefined reads are those who don't contain the minimum number of valid k-mer.
- * The thing is that:
- * - when called from mainBackend, the \n terminating the fastq record has not been counted yet.
- * - when called fromAuxBackend, the final \n has already been counted
- * So, values for buf_info.pchar and buf_info.cnt may or may not contain the final \n.
- * This is why I use the addCR parameter to add it or not.
- */
-/*
-void FqBaseBackend::writeToUndefFile(const T_buf_info& buf_info,const int& addCR) {
-  int l=strlen(cur_fq_record);
-    if (l==0) {
-        writeStrToUndefFile(buf_info.p_start_cur_rec,buf_info.pchar-buf_info.p_start_cur_rec+addCR);
-    } else {
-        memcpy(cur_fq_record+l,buf_info.p_start_cur_rec,buf_info.cnt+addCR);
-        l+=buf_info.cnt;
-        cur_fq_record[l+addCR]='\0';
-        writeStrToUndefFile(cur_fq_record,strlen(cur_fq_record)); // Try that, if there is performance problem due to resolving inheritance, will find a different way
-    }
-}*/
 
 
 
diff --git a/src/FqMainBackend.cpp b/src/FqMainBackend.cpp
index bb37e787a25ef842a92038791da334508815024e..a259053d242b70435a27d96694ec8a555a51826d 100644
--- a/src/FqMainBackend.cpp
+++ b/src/FqMainBackend.cpp
@@ -137,8 +137,8 @@ void FqMainBackend::onEndFastqRecord(T_fq_rec_info& rec_info,const T_buf_info& b
 
 void FqMainBackend::processBuf(T_buf_info& buf_info,unsigned char f_id,unsigned long cur_offset) {
     static T_fq_rec_info fq_rec_info;
-    static int num_l_in_rec; /* counter to know on which line inside the fastq record we are */
-    static int qual_score=0;
+    static int num_l_in_rec=5; /* counter to know on which line inside the fastq record we are */
+    //static int qual_score=0;
     static int n;
     int start_rec_in_buf=0;
 
@@ -146,7 +146,7 @@ void FqMainBackend::processBuf(T_buf_info& buf_info,unsigned char f_id,unsigned
     while (buf_info.cnt<=buf_info.real_bufsize-1) {
         switch (*buf_info.pchar){
             case k_read_id_start:
-                if (qual_score) goto inc_score;
+                if (num_l_in_rec==4) goto inc_score;
                 else {
                     buf_info.p_start_cur_rec=buf_info.pchar;
                     fq_rec_info.rstart_offset=cur_offset-buf_info.real_bufsize+buf_info.cnt;
@@ -155,31 +155,23 @@ void FqMainBackend::processBuf(T_buf_info& buf_info,unsigned char f_id,unsigned
                     num_l_in_rec=1;
                     fq_rec_info.nb_nucleotides_in_read=0;
                     fq_rec_info.nb_nucleotides_in_read_PE2=0;
+                    fq_rec_info.nb_k_mers_in_error=0;
+                    fq_rec_info.nb_k_mers_in_error_in_PE2=0;
+                    fq_rec_info.st=0;
+                    fq_rec_info.idx_nucl_in_read=0;
+                    n=0; // counter for k-mers in error
                 }
                 break;
-            case k_read_qual_start:
-            	if (qual_score) goto inc_score; // In this case we are already processing the read score. The + char is simply phred score 43-33=10 if phred33.
-                qual_score=1;
-                fq_rec_info.nb_k_mers_in_error=0;
-                fq_rec_info.nb_k_mers_in_error_in_PE2=0;
-                fq_rec_info.st=0;
-                fq_rec_info.idx_nucl_in_read=0;
-                n=0; // counter for k-mers in error
-                break;
             case '\n':
                 //debug_processBuf(on_line_end,buf_info,fq_rec_info.rstart_offset);
-                (qual_score==1)?qual_score++:qual_score;
                 num_l_in_rec+=1;
-                if (num_l_in_rec==5) {
-                    qual_score=0;/* end of fastq record */
-                    onEndFastqRecord(fq_rec_info,buf_info);
-                 }
+                if (num_l_in_rec==5) onEndFastqRecord(fq_rec_info,buf_info);
                 break;
             default:
             //debug_processBuf(on_store_read_id,buf_info,fq_rec_info.rstart_offset);
             (num_l_in_rec==2)?fq_rec_info.nb_nucleotides_in_read++:fq_rec_info.nb_nucleotides_in_read;
             inc_score:
-                { if (qual_score==2) onIncScore(fq_rec_info,buf_info,n);
+                { if (num_l_in_rec==4) onIncScore(fq_rec_info,buf_info,n);
                 }
                 break;
         }
diff --git a/src/Makefile.in b/src/Makefile.in
deleted file mode 100644
index a112f5c9051215ae924245e59465707aaa2d90ae..0000000000000000000000000000000000000000
--- a/src/Makefile.in
+++ /dev/null
@@ -1,737 +0,0 @@
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-# @configure_input@
-
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-
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-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
-# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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-
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-
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diff --git a/src/unit_test_fqreader.cpp b/src/unit_test_fqreader.cpp
index bb727735c1ad197f6e59e1ae63557415a225218c..b5eb927d67da46feb759cbb4858d09f2c69c14bc 100644
--- a/src/unit_test_fqreader.cpp
+++ b/src/unit_test_fqreader.cpp
@@ -647,14 +647,11 @@ AAAAAEEAEEEEEEEEE6EE/EEEEEEEEAEEAEEEEEEEEEEEEEEAEEEA/A/EEEAEEEEEE/EE</EAEEEEEE/E
     FqBaseBackend::setQualThreshold(qual_thres);
     FqMainBackend::setTreatPEMode(0);
     FqMainBackend be(&sr);
-    //be.setUndefFile((char *) "../test/data/unit/test_processBuf.undef.fq");
     buf_info.buf=buf;
     buf_info.pchar=buf;
     buf_info.cnt=0;
     buf_info.real_bufsize=strlen(buf);
-    //be.openUndefFile();
     be.processBuf(buf_info,f_id1,348);
-    //be.closeUndefFile();
     // check that read is rejected
     for (rit=sr.rbegin(); rit!=sr.rend(); ++rit) { //process map in reverse order (by decreasing scores).
        for (it_offs=rit->second.begin();it_offs!=rit->second.end();it_offs++) {
@@ -664,18 +661,65 @@ AAAAAEEAEEEEEEEEE6EE/EEEEEEEEAEEAEEEEEEEEEEEEEEAEEEA/A/EEEAEEEEEE/EE</EAEEEEEE/E
        }
     }
     assert(cnt_read==0);
-    /*std::ifstream t("../test/data/unit/test_processBuf.undef.fq");
-    std::string rej_str;
-  
-    t.seekg(0, std::ios::end);
-    rej_str.reserve(t.tellg());
-    t.seekg(0, std::ios::beg);
-  
-    rej_str.assign((std::istreambuf_iterator<char>(t)),
-               std::istreambuf_iterator<char>());
-    assert(strcmp(rej_str.c_str(),buf)==0);
+}
+
+void test_processBufSinglePlusCharBug() {
+	srp::reverse_iterator rit;
+	i_dim::iterator it_offs;
+	k_dim::iterator it_struct;
+	std::string bufstr="@SRR001666.4 071112_SLXA-EAS1_s_7:5:1:792:346/2\n\
+AAAGTTAACGAACGCGCGAAAGGTCTGGAAGGTATC\n\
++\n\
+IIIIIIII@+IIIIIIIIB@7IIF=III+CIID0I+\n\
+@NB501291:419:HWLVNBGXK:1:11101:20148:1052 2:N:0:ATCTCAGG+NGGAGAGA\n\
+GATTTTAAANNNNNNNNNAAATNNNNNNNNNNNNNNNCNNNNNNNNNNNNNNAANTTAANGNAANCTGATTACCATGNTAGNNCATATTAGTTNGANCGCCGCGTTNTTCNANACATANNGTAATCNNANTNACTAAGTATTCNTNCGGTA\n\
++\n\
+AAAA/EEEE#########EEEE###############E##############EE#EEEE#E#EE#/EEEEEEEAEEE#EEE##<AAEEEEEEE#AE#6EE/EEE<E#EEE#E#EEEA/##/EEEE<##<#/#/<AE/AA/EE/#A#/AAA/\n\
+@NB501291:419:HWLVNBGXK:1:11101:11957:1078 2:N:0:ATCTCAGG+CGGAGAGA\n\
+ATTATATGATGCAGTAAAAGCCATTGGTGAAGAGCTATGCCCACAATTAGGTATTACTATTCCGGTGGGTAAGGACTCAATGTCCATGAAAACGCGTTGGCAAGATGATCAAGGGAAAACGAAAGAAGTTATTTCACCGCTCTCTTTAGTT\n\
++\n\
+AAAAAEEEEEEEEEEEEE/EEEEEEEEEEEEEEEEEEEEE<EEEAEEEEA<EAEEEEEEEAAAAE<EEEE/EEEEAAEEEEEEE<EEEEAAEEE<AE<EE<EEEEAEE/EE/EEEE<EE/EE/E/EEEEEAE<E</<<<AE<AAAEEE/AE\n";
+	char * buf=(char *) bufstr.c_str();
+	srp sr;
+	T_buf_info buf_info;
+	FasqQualThreshold qual_thres;
+	qual_thres.min_correct_k_mers_in_read=1;
+	qual_thres.nucl_score_threshold=k_phred_32;
+	qual_thres.k=25;
+	FqBaseBackend::setQualThreshold(qual_thres);
+	FqMainBackend::setTreatPEMode(0);
+	FqMainBackend be(&sr);
+	buf_info.buf=buf;
+	buf_info.pchar=buf;
+	buf_info.cnt=0;
+	buf_info.real_bufsize=strlen(buf);
+	unsigned char f_id1=1;
+	be.processBuf(buf_info,f_id1,855);
+	int cnt_read=0;
+	for (rit=sr.rbegin(); rit!=sr.rend(); ++rit) { //process map in reverse order (by decreasing scores).
+		int score=rit->first;
+	    for (it_offs=rit->second.begin();it_offs!=rit->second.end();it_offs++) {
+	    	unsigned int q=it_offs->first;
+	    	assert(q==0);
+	        for (it_struct=it_offs->second.begin();it_struct!=it_offs->second.end();it_struct++) {
+	            cnt_read++;
+	            if (cnt_read==1) {
+	            	assert(score==9); // real score is 5016+151*k_phred_32 but it is normalized by taking the quotient of a division by 1000.
+	            	//assert(it_struct->read_a1==429);
+	            }
+	            else if (cnt_read==2) {
+	            	assert(score==8); // real score is 3076 + 151*k_phred_32
+	            	//assert(it_struct->read_a1==120);
+	            }
+	            else if (cnt_read==3) {
+	            	assert(score==2); // real score is 1256 + 36*k_phred_32 (we don't do the substraction to gain calculation time).
+	            	//assert(it_struct->read_a1==0);
+	            }
+	        }
+	    }
+	}
+	assert(cnt_read==3);
 
-    assert(remove((char *) "../test/data/unit/test_processBuf.undef.fq")==0);*/
 }
 
 void test_processBufPE() {
@@ -707,10 +751,8 @@ AAAAAEEEEEEEEEEAEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEAEEEAEEEEEEEEEEEEEEAEEEEEEEEEEEE
     FqMainBackend::setTreatPEMode(0);
 
     FqMainBackend be(&sr);
-    //be.setUndefFile((char *) "../test/data/unit/test_processBuf_PE1.undef.fq");
 
     FqAuxBackend be2;
-    //be2.setUndefFile((char *) "../test/data/unit/test_processBuf_PE2.undef.fq");
 
 
     buf_info.buf=buf_PE1;
@@ -726,11 +768,7 @@ AAAAAEEEEEEEEEEAEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEAEEEAEEEEEEEEEEEEEEAEEEEEEEEEEEE
 
     be.setAuxProcessor(&be2);
 
-    //be.openUndefFile();
-    //be2.openUndefFile();
     be.processBuf(buf_info,f_id1,348);
-    //be.closeUndefFile();
-    //be2.closeUndefFile();
 
     // check that read is selected
     for (rit=sr.rbegin(); rit!=sr.rend(); ++rit) { //process map in reverse order (by decreasing scores).
@@ -741,16 +779,6 @@ AAAAAEEEEEEEEEEAEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEAEEEAEEEEEEEEEEEEEEAEEEEEEEEEEEE
        }
     }
     assert(cnt_read==1);
-
-    /*struct stat fileStat;
-    stat("../test/data/unit/test_processBuf_PE1.undef.fq", &fileStat);
-    assert(fileStat.st_size==0);
-
-    stat("../test/data/unit/test_processBuf_PE2.undef.fq", &fileStat);
-    assert(fileStat.st_size==0);
-
-    assert(remove((char *) "../test/data/unit/test_processBuf_PE1.undef.fq")==0);
-    assert(remove((char *) "../test/data/unit/test_processBuf_PE2.undef.fq")==0);*/
 }
 
 
@@ -782,7 +810,6 @@ void Aux_MimicBigPEFilesWithMQOptions(const FasqQualThreshold& qual_thres,const
     int cnt_read=0;
 
     for (rit=sr.rbegin(); rit!=sr.rend(); ++rit) { //process map in reverse order (by decreasing scores).
-        //unsigned long score=rit->first;
         for (it_offs=rit->second.begin();it_offs!=rit->second.end();it_offs++) {
             for (it_struct=it_offs->second.begin();it_struct!=it_offs->second.end();it_struct++) {
                 cnt_read++;
@@ -790,15 +817,6 @@ void Aux_MimicBigPEFilesWithMQOptions(const FasqQualThreshold& qual_thres,const
         }
     }
     assert(cnt_read==nb_expected_reads);
-    /*if (nb_expected_reads==6) {
-        assert(compareFilesLileByLine(fq_1_test_undef,fq_1_expected_undef_100)==0);
-        assert(compareFilesLileByLine(fq_2_test_undef,fq_2_expected_undef_100)==0);
-    } else {
-        assert(compareFilesLileByLine(fq_1_test_undef,fq_1_expected_undef_180)==0);
-        assert(compareFilesLileByLine(fq_2_test_undef,fq_2_expected_undef_180)==0);
-    }
-    assert(remove((char *) "../test/data/unit/09-4607_S43_R1.undef.fastq")==0);
-    assert(remove((char *) "../test/data/unit/09-4607_S43_R2.undef.fastq")==0);*/
 }
 
 
@@ -826,6 +844,8 @@ void test_MimicBigPEFilesWithMQOptions() {
 }
 
 int main(int argc, char **argv) {
+	cout<<"test for the case where there are + characters in read score and or read id"<<endl;
+	test_processBufSinglePlusCharBug();
     cout<<"test for single file"<<endl;
     test_processSingleFile();
     cout<<"test for PE files"<<endl;
diff --git a/test/Makefile.in b/test/Makefile.in
deleted file mode 100644
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--- a/test/Makefile.in
+++ /dev/null
@@ -1,804 +0,0 @@
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-	-rm -f Makefile
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-.PRECIOUS: Makefile
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-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT: