Hi,

>> but am not able to opening them with
>> the student version of AutoCAD 2011

Why not? Do you get an error message or does AutoCAD crash when you try to open one of the files or what happens?

If you want to upload a file so we can look into it, then upload one or two of that drawings.

- alfred -

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Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ... blog.ish-solutions.at ... LinkedIn ... CDay 2025
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(not an Autodesk consultant)