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# When importing SOLIDWORKS/CATIA or STEP files the error message "The CAD interoperability libraries were unable to be located" appears

## Issue:

Some users encounter the error message "The CAD interoperability libraries were unable to be located" when attempting to import CAD data.

## Applies to:

* SolidWorks
* CATIA
* CATPart
* STEP
* CAD
* Parasolid

## Cause:

This error message occurs when there is a conflict or missing file relating to nTop's translators in your computer.

## Solution:

We are still addressing this issue.

* Download the latest Windows update: Users have reported updating their Windows to have solved the problem of importing their parts.
* As a workaround, try exporting a **Parasolid (.x\_t)** from your CAD tool. Parasolid will always yield more reliable results than STEP or native CAD files.
* If this error is occurring with a Parasolid file, try changing the extension from .x\_t to .x\_b.
* Try saving your file as a different support file type
* Make sure you only have one version of nTop installed.

## Keywords:

*import cad error to file step be interop located library issue unable interoperability libraries translators*