--- trunk/OOPSE/libmdtools/DumpReader.cpp	2004/05/27 18:59:17	1203
+++ trunk/OOPSE/libmdtools/DumpReader.cpp	2004/06/11 17:16:21	1268
@@ -84,16 +84,11 @@ void DumpReader::scanFile( void ){
 
 void DumpReader::scanFile( void ){
 
-  int vectorSize;
-  int i, j, k;
+  int i, j;
   int lineNum = 0;
   char readBuffer[2000];
-  char* foo;
   fpos_t *currPos;
-  double time;
 
-
-
 #ifdef IS_MPI
   if( worldRank == 0 ){
 #endif // is_mpi
@@ -176,7 +171,8 @@ void DumpReader :: readSet( int whichFrame ){
 
 void DumpReader :: readSet( int whichFrame ){
 
-   int i, j;
+  int i;
+  unsigned int j;
 
 #ifdef IS_MPI
   int done, which_node, which_atom; // loop counter
@@ -616,6 +612,12 @@ char* DumpReader::parseDumpLine(char* readLine, StuntD
 
     qSqr = (q[0] * q[0]) + (q[1] * q[1]) + (q[2] * q[2]) + (q[3] * q[3]);
 
+    if (fabs(qSqr) < 1e-6) {
+      sprintf(painCave.errMsg,
+          "initial quaternion error (q0^2 + q1^2 + q2^2 + q3^2 ~ 0).\n");
+       return strdup(painCave.errMsg);
+    }
+
     qLength = sqrt( qSqr );
     q[0] = q[0] / qLength;
     q[1] = q[1] / qLength;