Logicity is generating massive log file sometimes in excess of 2GB.
This is frequently consuming all available storage and consequently killing the PC.
Is there somewhere I can turn this off?

If you open the RRD in Logicity Solution Builder, do you have Enabled Logging toggled on in the Logging tab?

Thanks for your reply Bellis and apologies for my late response.
None of my solutions have the logging feature enabled.
The logs being created appear to be from the software itself and they are found in the user's temp folder.
C:\users\username\appdata\local\temp. The files range from small to well over 2 Gb. They have millions of lines of code in them and appear to be a step through as the program executes the solution. I've attached an example.

This isnt a setting in Bezlio, looking online it looks like it's diagnostic logging for the SAP Crystal Reports runtime:
apps.support.sap.com/sap/support/knowledge/public/en/1470978
We do not enable that by default, but maybe this will help you figure out where to turn it off?
Thanks!
Brian