UserForm always visible

Thanks, Roy. Quick as always.
Well, no; I'm pretty sure the macro does not contain any Hide or Unload instructions.
ACA

Thanks, Roy, for insisting in solving my problem.
As it happens I think I have stumbled upon the solution empirically by trial and error: I notice that my UserForm goes to Hide when the macro executed ends with and END instruction; and it stays visible when the macro is allowed to run up till the closing END SUB.
I don't know if it is an orthodox practice, but it seems to work fine that way.
Thanks for your efforts. I suscribe to all the messages of gratitude in the first thread in this forum. I ow you all more than I can say.
ACA

The form isn't hidden, it completely goes away: End resets everything.

There's usually no reason to use it.