Can't probe or debug an LLB downloaded from the Internet

[EricDM]

I have been successfully using a VI downloaded from the Internet for a "Serial Terminal" emulator. Now, using a new hardware board, this VI is no longer working. I"m trying to debug it the only way I know how, starting by inserting probes at interesting data points. Unfortunately, LV won't let me modify the downloaded VI at all -- I cannot even insert probe points.

I've attempted to attach the complete downloaded LLD file as it was downloaded. Perhaps someone could suggest what I need to do to get "write" permission to enable debugging of this code?

[Dennis_Knutson]

That example looks way to complicated for such a stratight-forward task.

The reason you can't place a probe is because debug is turned off. Go to the VI Properties>Execution. Check 'Allow Debugging' and uncheck 'Reentrant Execution'.