1 files changed, 11 insertions, 0 deletions
diff --git a/eval.c b/eval.c
index 4391110..6e0947c 100644
--- a/eval.c
+++ b/eval.c
@@ -66,6 +66,17 @@ evalquery(Term *query)
 					name = prettyprint(goal, 0, 0, 0, nil);
 					arity = 0;
 				}
+				print("Didn't find predicate %S in module %S\n", prettyprint(goal, 0, 0, 0, nil), module->name);
+				Predicate *p;
+				for(p = module->predicates; p != nil; p = p->next)
+					print("Available in %S: %S/%d\n", module->name, p->name, p->arity);
+				Module *sysmod;
+				if(systemmoduleloaded)
+					sysmod = getmodule(L"system");
+				else
+					sysmod = getmodule(L"user");
+				for(p = sysmod->predicates; p != nil; p = p->next)
+					print("Available in %S: %S/%d\n", sysmod->name, p->name, p->arity);
 				switch(flagunknown){
 				case UnknownError:
 					procedure = mkatom(name);