UMFPACK works now correctly for multiple right hand sides.

AMDiS/src/FileWriter.cc

@@ -165,7 +165,7 @@ namespace AMDiS {
 			      bool (*writeElem)(ElInfo*))
   {
     FUNCNAME("FileWriter::writeFiles()");
-    
+
     if ((adaptInfo->getTimestepNumber() % tsModulo != 0) && !force) 
       return;
 

AMDiS/src/ProblemVec.cc

@@ -763,11 +763,12 @@ namespace AMDiS {
  				 assembleFlag);     
     }
 
-    solverMatrix.setMatrix(*systemMatrix);
-	 
-    createPrecon();
+    if (asmMatrix) {
+      solverMatrix.setMatrix(*systemMatrix);      
+      createPrecon();
 
-    INFO(info, 8)("fillin of assembled matrix: %d\n", nnz);
+      INFO(info, 8)("fillin of assembled matrix: %d\n", nnz);
+    }
 
 #ifdef _OPENMP
     INFO(info, 8)("buildAfterCoarsen needed %.5f seconds system time / %.5f seconds wallclock time\n",

AMDiS/src/UmfPackSolver.h

@@ -86,11 +86,11 @@ namespace AMDiS {
 	else
 	  solver = new mtl::matrix::umfpack::solver<matrix_type>(A, UMFPACK_STRATEGY_SYMMETRIC);
       } else {
-	//	if (!multipleRhs)
+	if (!multipleRhs)
  	  if (store_symbolic)
  	    solver->update_numeric();
  	  else
-	    solver->update();
+	    solver->update();	
       }
      
       int code= (*solver)(x, b);