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It appears you are unwilling or incapable of Reading The Fine Manual.
Oracle9i Forms Developer and Forms Services
which clearly states the following:
1.11 When Closing the Browser without First Exiting the Running Form, the Runtime Process Is Still Running until It Times Out
When testing your Form from the Forms Builder on a windows platform, if you don't exit the Form before closing the browser, the Forms runtime will still run. Therefore, if you try to compile your form again, you will receive the following error message: "FRM-30087 Unable to compile the Forms file". The runtime process will die automatically after the FORMS90_TIMEOUT period (15 minutes by default)
# Make sure that you exit the Form before closing the browser
# Modify the FORMS90_TIMEOUT variable in the registry and reduce the value (in minutes). Make sure that the value entered is higher than the heartbeat applet parameter (2 minutes by default).
# If you close the browser without exiting the form, kill the ifweb90.exe process before to compile the form again.
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