When I was editing this morning, I found that whenever I would hover my mouse over a certain instruction, that a popup window would come up with the "encountered an improper argument" message, I tried it several times and it consistently would display. After pressing F8 to accept the rungs, the message stopped showing up.
BTW the instruction was a MOVER.
Just passing on the info.
I also had an issue this morning whenever I first connected to the plc with my computer, I was getting a PLC error/warning on the bottom of the screen, and when I clicked it this is the message that was displaying: 192.168.1.169 Port 29298(0x7272),02/12/13 04:34:12.132 ,"A comm client attempted to read a data address that was out of range. Zero data was returned."
I thought it was the result of a change I had made to the CMore, but after unplugging network cables, I discovered that it was DMD that was causing the error. I pressed the "No status" button and the error ceased, I pressed the "All status" and I can't get the error to come back.
Neither of these are an issue for me, I'm just passing on the info for your development team.