Hello
After I made a ladder in PMC I can't open it anymore, it gives me this error. This is the second time I have suffered the same thing. It is as if the ladder exceeds a number of rows, it can no longer be read.
Do you have any idea how to solve this?
Thanks.

Old build maybe?  I don't know, you didn't say what build you are running. 

Steve

Hello Steve
I have licensed version 4.2.0.4300, and the ladder was made directly in the software.
There is a limit to how many rows a ladder can have?
I also made smaller programs that I can still open, the one that I can no longer open is also the largest.
Yesterday I installed version 4.2.0.4612, the demo version, to see what is new, and out of curiosity I tried the ladder that did not open on the 4300 and to my surprise it opened.
I don't know if I can upgrade to the new version without altering the license, nor do I know if it's stable, as far as I can tell it's being tested intensively now.
If there is no solution to open the ladder in 4300 I just have to use the demo version of 4612 to open it and modify it.
But this is a temporary solution, because it means always having a second PC with version 4612 next to the machine in case you need to change something in the ladder, at least until you finish the settings of the machine.

Thanks.

You can can upgrade to any and all newer versions of Mach 4 with your license.  Not and issue.  Just copy your license from the 4300/Licenses folder to the 4612/Licenses.  If you install into a different directory than your 4300, they can both exist at the same time!    This makes testing a new version easy and going back to the old version if something doesn't work out even easier.  4612 will be way better than 4300 though.  The development version is up to 4719 at the moment, so 4612 isn't exactly bleeding edge anymore. 

Steve