Our Live Winshuttle vendor forms start off with a SAP look up query to check for pre existing data. Data seems to pass back to the form but then it just whirs and whirs and eventually comes back with the error message that 'RFCOpen connection failed RFC_Start_SAPGUI_Failure " (screenshot attached).
I can access all the servers ok.
Perform below steps in order to resolve the issue .
1) There is a SAP environment variable, RFC_CONNECT_TIMEOUT, to control the SAP logon time-out period which is 60 seconds by default. Setting this variable to a larger value like 120 or 180 will reduce or complete remove the chances of getting timeout. Please change the value of this SAP environment variable from 60 to 180,and if this variable does not exist and create it and set its value to 180.
The tcode rz11 can be used to see the SAP environment variables.
I am also attaching one SAP document- SAP_TIMEOUT_DURING_LOGON explaining the same issue.
2) Also please check on SAPIS server below settings are in place.
Go to the Control Panel, and then open SAP GUI Configuration.
a. Expand the Security Tree Node and then click Security Settings.
b. under Status, choose Customized.
c. Under Default Action, choose Allow or disabled
d. Click OK and restart the SAP GUI.
e. Restart the server
f. Restart the Winshuttle Worker and the WinshuttleWorkerLaunchGUI services.
g. Make sure the logged in user on SAPIS machine should be the user under which Winshuttle worker and Worker Launch GUI services are running.
Please log on with the worker service account on the sapis server and change the sapgui security settings to disabled. Then restart the sapis server.
3) Open Regedit - Search for - sap gui security setting (HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SAP\SAPGUI Front\SAP Frontend Server\Security\SecurityLevel = 0)
[x]startsaplogn registry value 0 and 1 (HKEY_LOCAL_MACHINE\Software\wow6432Node\SAP\SAPGUI\StartSaplogon =0)
Security Level need to be 0 and Start SAP Logon on need to be 0.
In any case these values are not there please make sure to add them .
Please note to restart the machine after making all these changes.