External Exception C000001D

Hi

I'm triyng to develop one application in Delphi 4 (release #3), but I
receive this message "External exception C000001D" and it happens also when I
move the mouse, so I can't continue.

What is it, please.

Thanks

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Emerson de Almeida Carneiro
Belo Horizonte - MG  Brasil
EMail: e.carne...@fteam.com