diff --git a/GeneratorInterface/ExhumeInterface/src/ExhumeHadronizer.cc b/GeneratorInterface/ExhumeInterface/src/ExhumeHadronizer.cc
index 13aecd2ce563d..19681e27ecb75 100644
--- a/GeneratorInterface/ExhumeInterface/src/ExhumeHadronizer.cc
+++ b/GeneratorInterface/ExhumeInterface/src/ExhumeHadronizer.cc
@@ -211,7 +211,6 @@ namespace gen {
       (static_cast<Exhume::DiPhoton*>(exhumeProcess_))->SetThetaMin(thetaMin);
       sigID = 400;
     } else {
-      sigID = -1;
       throw edm::Exception(edm::errors::Configuration, "ExhumeError") << " No valid Exhume Process";
     }
 
diff --git a/GeneratorInterface/GenFilters/plugins/PythiaAllDauVFilter.cc b/GeneratorInterface/GenFilters/plugins/PythiaAllDauVFilter.cc
index 8904611b3822e..2fc476a6c5db8 100644
--- a/GeneratorInterface/GenFilters/plugins/PythiaAllDauVFilter.cc
+++ b/GeneratorInterface/GenFilters/plugins/PythiaAllDauVFilter.cc
@@ -89,7 +89,7 @@ bool PythiaAllDauVFilter::filter(edm::StreamID, edm::Event& iEvent, const edm::E
   int OK(1);
   vector<int> vparticles;
   vector<bool> foundDaughter(dauIDs.size(), false);
-  auto dauCollection = &dauIDs;
+  const std::vector<int>* dauCollection = nullptr;
 
   HepMC::GenEvent* myGenEvent = new HepMC::GenEvent(*(evt->GetEvent()));
 
diff --git a/GeneratorInterface/LHEInterface/plugins/ExternalLHEProducer.cc b/GeneratorInterface/LHEInterface/plugins/ExternalLHEProducer.cc
index 2b9d38c2c222b..c2704431d38b0 100644
--- a/GeneratorInterface/LHEInterface/plugins/ExternalLHEProducer.cc
+++ b/GeneratorInterface/LHEInterface/plugins/ExternalLHEProducer.cc
@@ -110,7 +110,7 @@ class ExternalLHEProducer : public edm::one::EDProducer<edm::BeginRunProducer, e
   edm::EDPutTokenT<LHERunInfoProduct> beginRunPutToken_;
   class FileCloseSentry {
   public:
-    explicit FileCloseSentry(int fd) : fd_(fd){};
+    explicit FileCloseSentry(int fd) : fd_(fd) {};
 
     ~FileCloseSentry() { close(fd_); }
 
@@ -505,7 +505,6 @@ void ExternalLHEProducer::executeScript(std::vector<std::string> const& args, in
   close(filedes[1]);
   // If the exec succeeds, the read will fail.
   while (((rc2 = read(filedes[0], &rc, sizeof(int))) == -1) && (errno == EINTR)) {
-    rc2 = 0;
   }
   if ((rc2 == sizeof(int)) && rc) {
     throw cms::Exception("ExternalLHEProducer")
diff --git a/GeneratorInterface/ReggeGribovPartonMCInterface/src/read.cc b/GeneratorInterface/ReggeGribovPartonMCInterface/src/read.cc
index 5fc5cf97fdd97..cd6a717840157 100644
--- a/GeneratorInterface/ReggeGribovPartonMCInterface/src/read.cc
+++ b/GeneratorInterface/ReggeGribovPartonMCInterface/src/read.cc
@@ -5,7 +5,7 @@
 #include <cstring>
 
 int main(int numArgs, const char *args[]) {
-  int res;
+  // int res;
 
   if (numArgs != 2) {
     //PrintHelp(rs);
@@ -21,10 +21,10 @@ int main(int numArgs, const char *args[]) {
   }
 
   LzmaFile lzma;
-  res = lzma.Open(args[1]);
-  res = lzma.DecodeAll();
-  res = lzma.Close();
-
+  /*res =*/lzma.Open(args[1]);
+  /*res =*/lzma.DecodeAll();
+  /*res =*/lzma.Close();
+  /*
   if (res != SZ_OK) {
     if (res == SZ_ERROR_MEM) {
       return 0;  //PrintError(rs, kCantAllocateMessage);
@@ -37,5 +37,6 @@ int main(int numArgs, const char *args[]) {
     }
     return 0;  //PrintErrorNumber(rs, res);
   }
+  */
   return 0;
 }
diff --git a/GeneratorInterface/SherpaInterface/src/SherpackUtilities.cc b/GeneratorInterface/SherpaInterface/src/SherpackUtilities.cc
index 3247ff8037e03..d49edf480a0f2 100644
--- a/GeneratorInterface/SherpaInterface/src/SherpackUtilities.cc
+++ b/GeneratorInterface/SherpaInterface/src/SherpackUtilities.cc
@@ -417,7 +417,6 @@ namespace spu {
             printf("%c", buff[ll]);
           }
           printf("\n");
-          bytes_read = fread(buff, 1, 512, a);
           for (int ll = 0; ll < 512; ll++) {
             printf("%c", buff[ll]);
           }
@@ -431,7 +430,6 @@ namespace spu {
           }
           //~ printf("NEW LinkNAME: %s\n",newlonglinkname);
         } else if (buff[156] == 'L') {
-          bytes_read = fread(buff, 1, 512, a);
           for (int k = 0; k < filesize; k++) {
             newlongpathname[k] = buff[k];
           }