STEP7 Professional V13; FB Declaration Static: Data type TON is not allowed here

Product: STEP7 Professional V13
Reference: FB Declaration Static: Data type TON is not allowed here
Description:
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Hi,
I'm using Step7 Prof V13 SP1 upd7 & WinCC Adv V13 SP1 upd7.

In my project I'm using a 312CPU, Article No.: 6ES7 312-1AE14-0AB0, Version: V3.3 & TP1500 Comfort, Article No.:6AV2 124-0QC02-0AX0, Version:13.0.1.0

My Issue:
I've taken previously used FB from my Global library and inserted it into my new Project. In this FB I've declared an IEC Timer (TON) in the static section of the FB. When I go to upload to the PLC after TIA carries out the compilation I get error message 'Data type TON is not allowed here'. I've tried creating a new FB to test and had same issue for CTU,CTD,TOF.

See attached pics

This is really strange as it has always functioned before! Has anyone seen or heard of this issue before?

I'd appreciate any help, Cheers. :site:

Try creating a new project with a 312 and creating a new FB using the TON.

I was thinking that as well. Just started new one and no issues after compiling!
I think I know what happened, but don't understand why.
I started the project using an example project: smart server for a comfort panel from siemens.