===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/builtin/dp.c,v
retrieving revision 1.101
retrieving revision 1.102
diff -u -p -r1.101 -r1.102
--- OpenXM_contrib2/asir2000/builtin/dp.c	2017/02/27 05:21:19	1.101
+++ OpenXM_contrib2/asir2000/builtin/dp.c	2017/02/28 07:06:28	1.102
@@ -44,7 +44,7 @@
  * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
  * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
  *
- * $OpenXM: OpenXM_contrib2/asir2000/builtin/dp.c,v 1.100 2017/02/27 05:14:53 noro Exp $ 
+ * $OpenXM: OpenXM_contrib2/asir2000/builtin/dp.c,v 1.101 2017/02/27 05:21:19 noro Exp $ 
 */
 #include "ca.h"
 #include "base.h"
@@ -2118,7 +2118,7 @@ void Pnd_f4(NODE arg,LIST *rp)
 		*rp = f; return;
 	}
     mq = (Q)ARG2(arg);
-    if ( PL(NM(mq)) > 1 || BD(NM(mq))[0] >= (1<<30) ) {
+    if ( mq && (PL(NM(mq)) > 1 || BD(NM(mq))[0] >= (1<<30)) ) {
       node = mknode(1,mq);
       Psetmod_ff(node,&val);
       m = -2;
@@ -2151,7 +2151,7 @@ void Pnd_gr(NODE arg,LIST *rp)
 		*rp = f; return;
 	}
     mq = (Q)ARG2(arg);
-    if ( PL(NM(mq)) > 1 || BD(NM(mq))[0] >= (1<<30) ) {
+    if ( mq && (PL(NM(mq)) > 1 || BD(NM(mq))[0] >= (1<<30)) ) {
       node = mknode(1,mq);
       Psetmod_ff(node,&val);
       m = -2;
@@ -2168,6 +2168,9 @@ void Pnd_gr_postproc(NODE arg,LIST *rp)
 {
 	LIST f,v;
 	int m,do_check;
+    Q mq;
+    Obj val;
+    NODE node;
 	struct order_spec *ord;
 
 	do_weyl = 0;
@@ -2179,7 +2182,13 @@ void Pnd_gr_postproc(NODE arg,LIST *rp)
 	if ( !BDY(f) ) {
 		*rp = f; return;
 	}
-	m = QTOS((Q)ARG2(arg));
+    mq = (Q)ARG2(arg);
+    if ( mq && (PL(NM(mq)) > 1 || BD(NM(mq))[0] >= (1<<30)) ) {
+      node = mknode(1,mq);
+      Psetmod_ff(node,&val);
+      m = -2;
+    } else
+      m = QTOS(mq);
 	create_order_spec(0,ARG3(arg),&ord);
 	do_check = ARG4(arg) ? 1 : 0;
 	nd_gr_postproc(f,v,m,ord,do_check,rp);