Problem:

Form Designer fails to start in Net Express 3.1, 4.0, and 5.0, and displays the following error message:

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Form Designer requires Microsoft Internet Explorer 4.01 or greater to be installed on this system. See Installation Notes for more details. Form Designer cannot continue.

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The following error message occurs after clicking the OK button:

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Mfnetx.exe - COBOL Text Window

Execution error: file 'formdctl'

error code: 240, pc=0, call=1, seg=0

240    Object reference not valid

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Resolution:

The November 2006 update of Microsoft suggested to upgrade Microsoft Internet Explorer (IE) to v7.0.

This issue has been fixed in WrapPack 3 (WS3) for Net Express 5.0, and there is no fix for this for Net Express 3.1 and 4.0.

The alternative for Net Express 3.1 and 4.0 is to uninstall IE7 and install IE6 instead.