Windows 7 Cisco VPN 5250 emulation session receiving CPF5140 error

We have been using the combination of Window XP, Cisco VPN, and Client Access 5250 Emulation for our remote users to connect with our iSeries (V5R4) with success for years.  

We just recently had our first remote user with a new Windows 7 Professional 32 bit machine, using Cisco VPN (5.0.01.0600) and Client Access 5250 (V5R4 mod level 0  Service level SI37892) attempt a VPN connection the iSeries.  The connection is made without issue, until the initial program found on the user profile is ran and then the session is disconnected receiving the CPF5140 error message.   The program being launched by the user profile has been around for years and unchanged as well.  

Windows 7 is the only new variable in the equation.  Any help solving this is greatly appriceiated, since we cannot get Windows XP anymore.

Vince K
vt-tcAsked:
Who is Participating?
 
vt-tcConnect With a Mentor Author Commented:
We believe we have it solved, after working with Cisco.  The MSS size was being exceeded.

They have a work around:

Cisco MSS exceeded workaround

Thanks for all your help,
Vince K.
0
 
TheMakCommented:
Update your Cisco VPN to 5.0.07 latest available version because older version does not work with Windows 7 and they have compatibility issue with that version.

regards,
0
 
vt-tcAuthor Commented:
Thanks for the tip.  We updated, but it did not solve the issue.
0
Worried about phishing attacks?

90% of attacks start with a phish. It’s critical that IT admins and MSSPs have the right security in place to protect their end users from these phishing attacks. Check out our latest feature brief for tips and tricks to keep your employees off a hackers line!

 
vt-tcAuthor Commented:
Update....

I am finding that having the iSeries RPG display file compiled with RSTDDP(*YES) is causing problems.  If I run display files with RSTDSP(*NO), I can function, but not completely as we did before.

Running as described, our use of the SETATNPGM command does not work.  In fact, pressing the ESC key, now causes the disconnect to occur.

Hope this information helps solve the mystery.

Thanks,
Vince
0
 
vt-tcAuthor Commented:
more info on RSTDSP(*YES) from a different forum:

RSTDSP
Specifies whether data being shown on a display by this display file is saved at the time the file is suspended (made temporarily inactive) so that another display file can show different data on the same device. If the data for this file is saved, it is restored to the display of the device when the file is used again.
*NO: The data being shown by this file is not saved when the file is suspended. When control is returned to the programs using this file, the data is not restored.
*YES: The data being shown when the file is suspended is saved so it can be shown on the display when the file is used again."

According to IBM, setting RSTDSP(*YES) causes a "significant system and data transmission overhead" because approximately 3,000 bytes of data must be transmitted between the system and the display device.

Is it possible there is a setting in Windows 7 that does not allow for the "suspension" aspect that is described?   Or is the problem, related to the extra data transmission mentioned?    Or both?

Vince
0
 
vt-tcAuthor Commented:
FYI...the same scenario without using a VPN connection (direct connect instead) works fine.

Vince
0
 
vt-tcAuthor Commented:
As we continue with our process of elimination, it is narrowed down to Windows 7.   We have proven that the Telnet session via Cisco VPN, works just fine.  When Windows 7 is added to the equation, that is when we get the disconnect.  

Still looking for any help that can be offered

Thanks,
Vince
0
 
TheMakCommented:
Try these below options,

disable User Account control setting from Control Panel\User Accounts

Disable Internet Connection Sharing if its enabled on Windows 7

Disable your antivirus
0
 
vt-tcAuthor Commented:
We believe we have it narrowed down to the Cisco VPN Adapter and how its working with Windows 7.  

All works fine with Windows 7, until we add the VPN component.

All works fine with Windows XP, even with the very same VPN component.

So, something has changed compatibility wise with the VPN and Windows 7.

We do have a call into Cisco on the matter, but if this sheds any light on the issue for help by anyone else, we welcome it.

Sincerely,
Vince
0
 
vt-tcAuthor Commented:
No one else could solve it.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.