FRM-40039 - Error cannot attach library when running Designer form

Hi,

I am new to Oracle designer and have go to the point where I am trying to run a form I generated in Oracle Designer but the error I keep having is FRM-40039 cannot attach library - I get this for four libraries that are attached to the form; OFGCALL. OFGTEL, OFGNAVL, OFGMES. I have been playing about and attaching/removing them from the form, and saying NO to the dialog box that comes up saying 'attached library name xxxx contains a non-portable directory specification. Remove path?' seems to mean that the form will then start to have an error on one of the other libraries - so you would think that by attaching them all in this way that the form would run - but it doesnt.

Can someone please help? I have checked the forms path in the registry and it does point to the folder where these pll and plx files are located.

Many thanks