If you have a recently purchased 0BA8, there was an unannounced firmware upgrade I think towards the end of 2016.
Using the Logosoft Comfort software, you need to upgrade to version 8.1.0. This is usually done quickly and easily through HELP-Update Center from the menu along top of screen.
You must open the software/program "as an administrator" or it won't work.

So once you've got 8.1 installed and running, you have to check the FW version of your 0BA8:
-Diagnostics
-Software
-FW version
If it's 1.08.03, you have to select the PLC Type (bottom right of LSC screen) "LOGO!8.FS4"
If it's 1.01.01, you need to select type "0BA8.Standard"

The pre-8.1 version of LSC will program the 1.01.01 version of the 0BA8 ok though.

New question published by danyor22 is split to a separate thread with the subject Problems with the commands, and edit blocks from the screen.

Best regards
Jen_Moderator