--- loncom/homework/caparesponse/caparesponse.c	2003/07/28 18:30:08	1.11
+++ loncom/homework/caparesponse/caparesponse.c	2004/03/12 23:46:06	1.13
@@ -1,6 +1,6 @@
 /* The LearningOnline Network with CAPA 
  * CAPA wrapper code
- * $Id: caparesponse.c,v 1.11 2003/07/28 18:30:08 albertel Exp $
+ * $Id: caparesponse.c,v 1.13 2004/03/12 23:46:06 albertel Exp $
  *
  * Copyright Michigan State University Board of Trustees
  *
@@ -68,7 +68,7 @@ int caparesponse_capa_check_answer(char
 				   int sig_lbound,int sig_ubound, 
 				   char *ans_fmt, char *unit_str,
 				   int calc, char *id_list, char *pts_list, 
-				   char *rndseed)
+				   char *rndseed, char** reterror)
 				   
 {
   long result,seed1,seed2;
@@ -77,6 +77,7 @@ int caparesponse_capa_check_answer(char
   FILE *fp;
 
   /* need to initialize unit parser*/
+  *reterror=NULL;
   sprintf(filename,"/home/httpd/html/res/adm/includes/capa.units");
   if ((fp=fopen(filename,"r"))==NULL) {
     /* printf("Error: can't open %s\n",filename);*/
@@ -117,8 +118,9 @@ int caparesponse_capa_check_answer(char
   p.calc       = calc;
 
   result=capa_check_answer(&p,response,&error);
-
-  if (error!=NULL) {free(error);}
+  *reterror=error;
+  // Caller is expected to free reterror
+  //  if (error!=NULL) {free(error);}
 
   return result;
 }