You might try 'WAKEUP RESET' just before you do the 'WAKEUP +0 (IUCVMSG'
 (You didn't say, but assuming you tried this and it worked?).   You should
also end your routine with WAKEUP RESET (just before you restore msg values
- RESET does a SET MSG ON, which may not be what it was).   It's not clear
in the doc - but I 'think' doing a RESET clears IUCV..

Scott Rohling

On Thu, Aug 4, 2011 at 11:37 AM, Frank M. Ramaekers
<framaek...@ailife.com>wrote:

> ** ** ** ** ** **
>
> Good points.  I’ve had the problem with MSG/SMSGs still in limbo and the
> WAKEUP receives those first.  Is there a way to clear these prior to issuing
> the WAKEUP (or sending the SMSG)?****
>
> ** **
>
>  ****
>
> Frank M. Ramaekers Jr.****
>
> ** **
>
> ** **
>  ------------------------------
>
> *From:* The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] *On
> Behalf Of *Scott Rohling
> *Sent:* Thursday, August 04, 2011 10:55 AM
>
> *To:* IBMVM@LISTSERV.UARK.EDU
> *Subject:* Re: Trapping SMSG messages
> ****
>
>  ** **
>
> Another couple of points --   ****
>
> ** **
>
> -  Since you can't control who might send a message to you when - you
> probably want to loop until there are no more rc=5.    It could be a msg
> from another user is stacked in IUCV.   ****
>
> -  DESBUF is kind of brute force -- it wipes out the stack -- and there
> could conceivably be things stacked and needed by whatever calls you.
> Better to do a 'MAKEBUF';buf=rc   ...   and then 'DROPBUF' buf ...   then
> you only drop the things in your 'own' stack.. and you aren't affected by
> what may already be in the stack for whatever called you.  ****
>
> ** **
>
> Scott Rohling****
>
> On Thu, Aug 4, 2011 at 9:44 AM, Scott Rohling <scott.rohl...@gmail.com>
> wrote:****
>
> Try turning the 'SET MSG IUCV' to 'WAKEUP +0 (IUCVMSG' ..   I think this
> gets WAKEUP ready - and also issues the SET MSG IUCV.   The example under
> 'HELP WAKEUP' shows it done this way and I seem to recall needing to do it
> in something I'd written. ****
>
> ** **
>
> Scott Rohling****
>
> ** **
>
> On Thu, Aug 4, 2011 at 9:28 AM, Frank M. Ramaekers <framaek...@ailife.com>
> wrote:****
>
> I don’t quite understand why I’m missing the first IUCV MSG sent to my
> virtual machine after an IPL.   The basics of this program is:****
>
>  ****
>
> 1)                   Send a SMSG to VMUTIL of ‘RUOKAY’****
>
> 2)                   VMUTIL, if alive, will send back a MSG response
> “IMOKAY”****
>
> 3)                   If the proper response is received the RC is set to
> zero, all other cases it’s set to 1****
>
>  ****
>
> My short REXX:****
>
>  ****
>
>   Trace "O"                                                      ****
>
>   "PIPE LITERAL QUERY SET",                                      ****
>
>       "|  CP",                                                   ****
>
>       "|  SPLIT AT ,",                                           ****
>
>       "|  STRIP",                                                ****
>
>       "|  FIND MSG"||,                                           ****
>
>       "|  SPEC W2 1",                                            ****
>
>       "|  VAR SETMSG"                                            ****
>
>   "CP SET MSG IUCV"                                              ****
>
>   "CP SMSG VMUTIL RUALIVE"                                       ****
>
>   "WAKEUP +00:02 (QUIET IUCVMSG CONS"                            ****
>
>   wurc=rc                                                        ****
>
>   XRC=1  /* Assume bad */                                        ****
>
>   Select                                                         ****
>
>     When wurc==5 then          /* Message arrived */             ****
>
>       Do queued()                                                ****
>
>         Parse pull WuType WuWho WuMsg                            ****
>
>         If WuType=="*MSG" & WuWho=="VMUTIL" & WuMsg="IMOKAY" then****
>
>           XRC=0                                                  ****
>
>       End                                                        ****
>
>     When wurc==6 then          /* Console interrupt */           ****
>
>       Say "Interrupted" ****
>
>     Otherwise           ****
>
>       Nop               ****
>
>   End /* Select */      ****
>
>   "CP SET MSG" SetMsg   ****
>
>   /* Flush everything */****
>
>   "DESBUF"              ****
>
>   If Externals()>0 then ****
>
>     Parse external .    ****
>
> Exit XRC                ****
>
> l
> maint
> ****
>
> ENTER PASSWORD  (IT WILL NOT APPEAR WHEN
> TYPED):                                                                ***
> *
>
>
>
> ****
>
> HCPLNM101E DASD 0CF1 forced R/O; R/O by SYSTEM; stable by
> SYSTEM                                                ****
>
> HCPLNM101E DASD 0CF2 forced R/O; R/O by SYSTEM; stable by
> SYSTEM                                                ****
>
> z/VM Version 5 Release 4.0, Service Level 1003
> (64-bit),                                                        ****
>
> built on IBM Virtualization
> Technology
>                       ****
>
> There is no logmsg
> data
> ****
>
> FILES: 0066 RDR, 0007 PRT,   NO
> PUN
> ****
>
> LOGON AT 10:25:22 CDT THURSDAY
> 08/04/11
> ****
>
> z/VM V5.4.0    2011-03-31
> 08:13
> ****
>
>
>
> ****
>
> PIPINX086I CMS/TSO Pipelines, 5654-030/5655-A17 1.0112
> (Version.Release/Mod) - Generated 3 Jul 2010 at 11:32:36.****
>
> Source:  **Princeton** Runtime
> Distribution
> ****
>
> Ready; T=0.02/0.02
> 10:25:24
> ****
>
> vmutil
>
> ****
>
>  10:25:25  * MSG FROM VMUTIL  :
> IMOKAY
> ****
>
> Ready(00001); T=0.01/0.01 10:25:27
>                                                     ****
>
> vmutil                     ****
>
> Ready; T=0.01/0.01 10:25:41****
>
> vmutil                     ****
>
> Ready; T=0.01/0.01 10:25:44****
>
> vmutil                     ****
>
> Ready; T=0.01/0.01 10:25:44****
>
> vmutil                     ****
>
> Ready; T=0.01/0.01 10:25:45****
>
>  ****
>
> Any way to avoid missing this first MSG?****
>
>  ****
>
>  Frank M. Ramaekers Jr.****
>
>  ****
>
>  ****
>
> Systems Programmer****
>
> MCP, MCP+I, MCSE & RHCE****
>
>  ****
>
> American Income Life Insurance Co.****
>
> Phone: (254)761-6649****
>
>  ****
>
> 1200 Wooded ****Acres Dr****.****
>
> Fax: (254)741-5777****
>
>  ****
>
> ****Waco**, **Texas**  **76701********
>
>  ****
>
>  ****
>
>  ****
>
>  ****
>
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>
> ** **
>
> ** **
>  _____________________________________________________ This message
> contains information which is privileged and confidential and is solely for
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> aware that any review, disclosure, copying, distribution, or use of the
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