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# Known issues for RTE

This section describes troubleshooting and limitations for RTE Vusers.

Tip: For general troubleshooting and limitations, see Known issues.

In this topic:

## IP spoofing

IP spoofing is not supported for RTE Vusers.

## Initialization failures

When running an RTE script from Controller, it may fail during initialization with an error message like this:

"Warning: Extension rterun32.dll reports error -1 on call to function ExtPerThreadInitialize. Error: Vuser failed to initialize extension rterun32.dll."

Possible solution: This could be an "Out of Memory" issue. This can be fixed by increasing the Desktop Heap. In this case, change the last value of the SharedSection parameter in [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\SubSystems\Windows].

## Recording issue: Error 6131

When trying to record an RTE script in VuGen, the recording may fail at the beginning, with the following error message:

"Error 6131. Please contact technical support."

Solution: Set the rtegate.exe executable to run in Compatibility mode for Windows 8, using the following method.

1. Navigate to the folder <installdir>\bin.
2. Right-click the file rtegate.exe and select Properties > Compatibility.
3. Select the checkbox to enable the option Run this program in compatibility mode for, and select Windows 8 from the list.

## See also

- Known issues

https://admhelp.microfocus.com VuGen,Professional Performance Engineering,Performance Engineering for Developers 8942
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