I have created an assembly, went into layout mode, made a sketch, and converted it to a block. I then tried to make a part from the block, and when I did, it's now coming back and saying that my "sketch is over defined" (which I'm almost certain it isn't, unless there's a constraint which is "invisible"). Also, it seems that once I get this warning/error, it never goes away, even after I've deleted ALL constraints! Seems like a bug?

Also, I'm noticing that the block which shows up in the assembly layout is NOT parametrically linked to the same block I saved as a *.sldblk extension in my blocks directory. I want the ability to change dimensions on the block and have it update ALL parts created from that block - seems like an easy & reasonable thing to do. 

Both of these issues (receiving the "over defined" warning, and not having the block parametrically linked) are beyond frustrating, and I've spent WAY more time trying to resolve this than I should have.

Does anyone have any links, threads, etc for a fix for this?

I'm running Solidworks Professional 2019, SP 5.0

TIA,

Rob