TTMSFMXTreeView Stretch column index out of range

TTMSFMXTreeView Stretch column index out of range

I've got an FMX Project created in XE8 that I'm trying to update to Delphi 10.3.2.

When I attempt to open the project, I get the following error on the main form:

Error creating form: Stretch column index out of range.

the result is not being able to enter design mode for the form. I've got many of these treeviews on the form, and I've tried modifying the FMX so that all the StretchColumn's are:

ColumnsAppearance.StretchColumn = 0

All of them have at least 2 columns. But I still get this error.

Dear Mike,


It's unclear exactly why this happens, but I suggest to clear out the Stretch property in the FMX form file and then re-open the project.
Yeah, I was just trying that. I found a form with just one treeview on it, and removing the line from the FMX file allowed it to load, so I'll try that with the main form.

Thanks