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Split from Maximum length of code area reached (max. 64 Kbytes).

There is 64Kb memory restriction on PCS7 SCL Code with debugInfo.
If you do not need debug info then disable it using {CreateDebugInfo := ‘n’} at starting of SCL Code or from Customize > Compiler deselect Create Debug Info. 

If need to check how much memory use by Block then go to Blocks >  go to property of FBXX > General - Part 2 . In that Sum all memory that will be your total size of block.


https://support.industry.siemens.com/cs/document/771569?dti=-1&lc=en-WW