--- old/sympol/raycomputationlrs.cpp
+++ new/sympol/raycomputationlrs.cpp
@@ -66,7 +66,6 @@
         return true;
     }
 
-    lrs_mp_close();
     
     if (RayComputationLRS::ms_fIn != NULL) {
         if (std::fclose(RayComputationLRS::ms_fIn)) {
