SF light - Area length error when writing, OB121

Hello all,

Could you assist me in clearing this fault? in the diagnostic buffer it says OB121 and addresses 1174, 1222, 1218, 1214, and 1210. Are these DB addresses OB121 cannot read? I am not familiar with this.

Greatly appreciated.

Hello,

look again to structure of DB and correct offset use. Is your DB already downloaded to CPU with your preffered structure? Check this. Look to your good working access in your program to some of other Variables in DB which working and compare with your problematic access in program. If you can, attach some screenshots of structure DB (problematic place) and where in code you try access them. ZIP screenshots and attach here file. Pls be kind also post info, which addresses working ok (tell us addresses values).