diff --git a/doc/simh_doc.doc b/doc/simh_doc.doc
index 324442a2..62eafc22 100644
Binary files a/doc/simh_doc.doc and b/doc/simh_doc.doc differ
diff --git a/scp.c b/scp.c
index 8b8881f1..2364519f 100644
--- a/scp.c
+++ b/scp.c
@@ -1623,15 +1623,20 @@ ASSERT      failure have several different actions:
       " The SEND command provides a way to insert input into the console device of\n"
       " a simulated system as if it was entered by a user.\n\n"
       "++SEND {-t} {after=nn,}{delay=nn,}\"<string>\"\n\n"
+      "++NOSEND\n\n"
+      "++SHOW SEND\n\n"
       " The string argument must be delimited by quote characters.  Quotes may\n"
       " be either single or double but the opening and closing quote characters\n"
       " must match.  Data in the string may contain escaped character strings.\n\n"
       " The SEND command can also insert input into any serial device on a\n"
       " simulated system as if it was entered by a user.\n\n"
-      "++SEND {-t} {<dev>:line} {after=nn,}{delay=nn,}\"<string>\"\n"
+      "++SEND {-t} {<dev>:line} {after=nn,}{delay=nn,}\"<string>\"\n\n"
       "++NOSEND {<dev>:line}\n\n"
+      "++SHOW SEND {<dev>:line}\n\n"
       " The NOSEND command removes any undelivered input data which may be\n"
-      " pending on a line.\n"
+      " pending on the CONSOLE or a specific multiplexer line.\n\n"
+      " The SHOW SEND command displays any pending SEND activity for the\n"
+      " CONSOLE or a specific multiplexer line.\n"
       "4Delay\n"
       " Specifies an integer (>=0) representing a minimal instruction delay\n"
       " between characters being sent.  The delay parameter can be set by\n"
@@ -1681,6 +1686,7 @@ ASSERT      failure have several different actions:
       " when specific output has been generated by the simulated system.\n\n"
       "++EXPECT {dev:line} {[count]} {HALTAFTER=n,}\"<string>\" {actioncommand {; actioncommand}...}\n\n"
       "++NOEXPECT {dev:line} \"<string>\"\n\n"
+      "++SHOW EXPECT {dev:line}\n\n"
       " The string argument must be delimited by quote characters.  Quotes may\n"
       " be either single or double but the opening and closing quote characters\n"
       " must match.  Data in the string may contain escaped character strings.\n"
@@ -1698,7 +1704,10 @@ ASSERT      failure have several different actions:
       " to match other expect rules which may already be defined.\n"
       " Data which is output prior to the definition of an expect rule is not\n"
       " eligible to be matched against.\n\n"
-      " The NOEXPECT command removes a previously defined EXPECT command.\n"
+      " The NOEXPECT command removes a previously defined EXPECT command for the\n"
+      " console or a specific multiplexer line.\n\n"
+      " The SHOW EXPECT command displays all of the pending EXPECT state for\n"
+      " the console or a specific multiplexer line.\n"
        /***************** 80 character line width template *************************/
       "4Switches\n"
       " Switches can be used to influence the behavior of EXPECT rules\n\n"
@@ -3924,7 +3933,7 @@ tptr = get_glyph (cptr, gbuf, ',');
 if (sim_isalpha(gbuf[0]) && (strchr (gbuf, ':'))) {
     r = tmxr_locate_line_expect (gbuf, &exp);
     if (r != SCPE_OK)
-        return r;
+        return sim_messagef (r, "No such active line: %s\n", gbuf);
     cptr = tptr;
     }
 else