Construct (OSF/1)

I have a problem with the construct statement. When I press the interrupt key in a construct, when the window is closed i get the following error: Program stopped at "bug.4gl", line number ... FORMS statement error number -1141. Cannot close window with active INPUT, DISPLAY ARRAY or MENU statement. Follows a small program to demonstrate the problem. {--------------------------------------------} main define s char(256) defer interrupt open window w at 2, 2 with form "bug" attribute ( border ) construct by name s on a close window w end main {--------------------------------------------} Is this a known bug ? Is there any workaround ? The environment is: Operating System OSF1 T1.3 80.2 alpha INFORMIX-4GL Version 4.10.UE2 INFORMIX-OnLine Version 5.00.UD1 Thanks. ------------------------------------------------------------------------------ | Carlos Ponte | | S.S.F. - Servicos de Software Financeiro, Lda VOICE: +351 (1) 720-5000 | | Estrada da Luz 104, Loja A FAX: +351 (1) 720-5090 | | 1600 Lisboa E-MAIL: cmp@ssf.pt | | PORTUGAL | ------------------------------------------------------------------------------