Variable used without being declared error message

Hi,
Need a little help with an error message that pops up every time I try to perform an action.
Below is a screen shot of the error message?

AutoIt Error
Line 1583 (File “C:Program FilesRainmeterAddonsMakeStallerMakeStaller.exe”):
Error: Variable used without being declared.
OK
I had to recently update my AutoIt which I had done successfully on my Windows 7 PC.
I had downloaded the latest version from https://www.autoitscript.com/autoit3/files/beta/autoit/
I had written a new script, which I tried to compile and I get the above error message.
This has never happened before I upgraded the software.
After this update, any script I compile comes up with the same error.
For testing purposes I tried to compile an older script, which I had done before and still it comes up with the same error message.
Does anyone have any idea why this error message pops up?
