New input not recognizing any columns

[brwright]

Sometimes when I add a new input to an existing workflow, the tools attaching to it don't recognize any of the columns. This includes the Select tool. It's like the canvas is corrupted. The same input will work in a new canvas but I cannot add to a canvas once it's been around awhile. I am using the latest version of Designer and I have restarted the application. This has happened with various workflows. 

[binuacs]

@brwright might be the issue with AMP Engine. Can you try to run the workflow after unchecking the AMP engine option

Options-use settings 

[Qiu]

@brwright 
also we better check if you have checked this option.

[brwright]

Here is my advanced user settings screen. I havent changed anything. 

[brwright · Accepted solution]

I unchecked that box and ran it again. Same behavior.  I then noticed that on the workflow itself, Use Amp Engine was still checked, even though it is now globally deselected.   So I deselected it on the actual workflow and ran it again, this time it works. If I turn it back on, it wont pick up any columns again.

Something is amuck with the AMP Engine. This seems like a bug.