Greetings,

Hope all are doing well.

I am working on a project that has been migrated from S7-315 to S7-1513. The project is currently on TIA Portal V17.

The error LED on the PLC keeps blinking once the project has been loaded. On checking the "Diagnostics buffer" it says "Area length error in FC14". The screenshot of the "Diagnostics buffer" page has been attached. I have tried checking FC14 which was originally written using STL. Unfortunately, I am not well versed with this language, and I am unable to understand what is wrong here. 

I would be grateful if you could help me understand and remove this error.

Thank you for your time and patience.

Hellow Canis!

it looks like you are trying to load area -1440 in DBNo block. I don't think you can have negative datablock address positions. I believe something like this.

Br

Thank you gvatte for your detailed explanation.

I now understand how to manipulate the other parts of the program to remove this error signal.