diff --git a/bootstrap/unix-44/OPP.c b/bootstrap/unix-44/OPP.c
index d9698b7e..01d2144d 100644
--- a/bootstrap/unix-44/OPP.c
+++ b/bootstrap/unix-44/OPP.c
@@ -1783,6 +1783,24 @@ void OPP_Module (OPT_Node *prog, SET opt)
 	if (OPP_sym == 63) {
 		OPS_Get(&OPP_sym);
 	} else {
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"Unexpected symbol found when MODULE expected:", (LONGINT)46);
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  sym:        ", (LONGINT)15);
+		OPM_LogWNum(OPP_sym, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.name:   ", (LONGINT)15);
+		OPM_LogWStr(OPS_name, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.str:    ", (LONGINT)15);
+		OPM_LogWStr(OPS_str, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.numtyp: ", (LONGINT)15);
+		OPM_LogWNum(OPS_numtyp, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.intval: ", (LONGINT)15);
+		OPM_LogWNum(OPS_intval, ((LONGINT)(1)));
+		OPM_LogWLn();
 		OPP_err(16);
 	}
 	if (OPP_sym == 38) {
diff --git a/bootstrap/unix-48/OPP.c b/bootstrap/unix-48/OPP.c
index d9698b7e..01d2144d 100644
--- a/bootstrap/unix-48/OPP.c
+++ b/bootstrap/unix-48/OPP.c
@@ -1783,6 +1783,24 @@ void OPP_Module (OPT_Node *prog, SET opt)
 	if (OPP_sym == 63) {
 		OPS_Get(&OPP_sym);
 	} else {
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"Unexpected symbol found when MODULE expected:", (LONGINT)46);
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  sym:        ", (LONGINT)15);
+		OPM_LogWNum(OPP_sym, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.name:   ", (LONGINT)15);
+		OPM_LogWStr(OPS_name, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.str:    ", (LONGINT)15);
+		OPM_LogWStr(OPS_str, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.numtyp: ", (LONGINT)15);
+		OPM_LogWNum(OPS_numtyp, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.intval: ", (LONGINT)15);
+		OPM_LogWNum(OPS_intval, ((LONGINT)(1)));
+		OPM_LogWLn();
 		OPP_err(16);
 	}
 	if (OPP_sym == 38) {
diff --git a/bootstrap/unix-88/OPP.c b/bootstrap/unix-88/OPP.c
index 5f515091..be7c13b5 100644
--- a/bootstrap/unix-88/OPP.c
+++ b/bootstrap/unix-88/OPP.c
@@ -1784,6 +1784,24 @@ void OPP_Module (OPT_Node *prog, SET opt)
 	if (OPP_sym == 63) {
 		OPS_Get(&OPP_sym);
 	} else {
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"Unexpected symbol found when MODULE expected:", (LONGINT)46);
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  sym:        ", (LONGINT)15);
+		OPM_LogWNum(OPP_sym, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.name:   ", (LONGINT)15);
+		OPM_LogWStr(OPS_name, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.str:    ", (LONGINT)15);
+		OPM_LogWStr(OPS_str, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.numtyp: ", (LONGINT)15);
+		OPM_LogWNum(OPS_numtyp, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.intval: ", (LONGINT)15);
+		OPM_LogWNum(OPS_intval, ((LONGINT)(1)));
+		OPM_LogWLn();
 		OPP_err(16);
 	}
 	if (OPP_sym == 38) {
diff --git a/bootstrap/windows-48/OPP.c b/bootstrap/windows-48/OPP.c
index d9698b7e..01d2144d 100644
--- a/bootstrap/windows-48/OPP.c
+++ b/bootstrap/windows-48/OPP.c
@@ -1783,6 +1783,24 @@ void OPP_Module (OPT_Node *prog, SET opt)
 	if (OPP_sym == 63) {
 		OPS_Get(&OPP_sym);
 	} else {
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"Unexpected symbol found when MODULE expected:", (LONGINT)46);
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  sym:        ", (LONGINT)15);
+		OPM_LogWNum(OPP_sym, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.name:   ", (LONGINT)15);
+		OPM_LogWStr(OPS_name, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.str:    ", (LONGINT)15);
+		OPM_LogWStr(OPS_str, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.numtyp: ", (LONGINT)15);
+		OPM_LogWNum(OPS_numtyp, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.intval: ", (LONGINT)15);
+		OPM_LogWNum(OPS_intval, ((LONGINT)(1)));
+		OPM_LogWLn();
 		OPP_err(16);
 	}
 	if (OPP_sym == 38) {
diff --git a/bootstrap/windows-88/OPP.c b/bootstrap/windows-88/OPP.c
index 5f515091..be7c13b5 100644
--- a/bootstrap/windows-88/OPP.c
+++ b/bootstrap/windows-88/OPP.c
@@ -1784,6 +1784,24 @@ void OPP_Module (OPT_Node *prog, SET opt)
 	if (OPP_sym == 63) {
 		OPS_Get(&OPP_sym);
 	} else {
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"Unexpected symbol found when MODULE expected:", (LONGINT)46);
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  sym:        ", (LONGINT)15);
+		OPM_LogWNum(OPP_sym, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.name:   ", (LONGINT)15);
+		OPM_LogWStr(OPS_name, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.str:    ", (LONGINT)15);
+		OPM_LogWStr(OPS_str, ((LONGINT)(256)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.numtyp: ", (LONGINT)15);
+		OPM_LogWNum(OPS_numtyp, ((LONGINT)(1)));
+		OPM_LogWLn();
+		OPM_LogWStr((CHAR*)"  OPS.intval: ", (LONGINT)15);
+		OPM_LogWNum(OPS_intval, ((LONGINT)(1)));
+		OPM_LogWLn();
 		OPP_err(16);
 	}
 	if (OPP_sym == 38) {
diff --git a/src/compiler/OPP.Mod b/src/compiler/OPP.Mod
index 09583505..56f2a3d0 100644
--- a/src/compiler/OPP.Mod
+++ b/src/compiler/OPP.Mod
@@ -990,7 +990,17 @@ MODULE OPP;  (* NW, RC 6.3.89 / 10.2.94 *)  (* object model 4.12.93 *)
         c: LONGINT; done: BOOLEAN;
   BEGIN
     OPS.Init; LoopLevel := 0; level := 0; OPS.Get(sym);
-    IF sym = OPS.module THEN OPS.Get(sym) ELSE err(16) END ;
+    IF sym = OPS.module THEN OPS.Get(sym) ELSE
+      (* Debug intermittent failure only found on OpenBSD *)
+      OPM.LogWLn;
+      OPM.LogWStr("Unexpected symbol found when MODULE expected:"); OPM.LogWLn;
+      OPM.LogWStr("  sym:        "); OPM.LogWNum(sym,1);            OPM.LogWLn;
+      OPM.LogWStr("  OPS.name:   "); OPM.LogWStr(OPS.name);         OPM.LogWLn;
+      OPM.LogWStr("  OPS.str:    "); OPM.LogWStr(OPS.str);          OPM.LogWLn;
+      OPM.LogWStr("  OPS.numtyp: "); OPM.LogWNum(OPS.numtyp,1);     OPM.LogWLn;
+      OPM.LogWStr("  OPS.intval: "); OPM.LogWNum(OPS.intval,1);     OPM.LogWLn;
+      err(16)
+    END;
     IF sym = OPS.ident THEN
       OPM.LogWStr("compiling "); OPM.LogWStr(OPS.name); OPM.LogW(".");
       OPT.Init(OPS.name, opt); OPS.Get(sym); CheckSym(OPS.semicolon);