Not enough memory crash when loading VBA userform

Question

Background:

I have a VBA userform with ~1050 checkboxes, and ~100 labels, all populated from the active Sheet. The labels are taken directly from t

Answer 1

I once fixed a crashing Excel form with many controls by making sure the code always refers all controls via the Controls collection:

Me.Controls("Cond1").Caption = .Cells(r, c + 1)

and never via their code names:

Me.Cond1.Caption = .Cells(r, c + 1)

It was weird, but it worked.
Try replacing all your Stb.Cond1.Caption with Stb.Controls("Cond1").Caption etc.

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That was about 15 years ago, and up until today it remained unclear to me why it worked and why on Earth I even thought that utilising Controls in this way might have something to do with fixing it. As I learned today, it is a long standing limitation in Excel on the number of controls that can be addressed directly by their name - a poorly documented limitation, and a poorly implemented one too, as such a limitation must produce a compilation error rather than a runtime error at a random moment.