checkout part from windchill using pro-toolkit

Hi

I have a part in windchill. Same part is available on local disk and it has been a child part of assembly. Assembly is not present in windchill, but part is present in windchill.

I am loading and displaying assembly from disk to Creo. As I need to check-in assembly, I am saving this assembly and it gets saved into workspace which is active. Post this, I tried to check out dependent part of assembly as it is present into windchill.

I intended to do use two API ProServerModelNameToAliasedURL() and ProServerObjectsCheckout() for part file so that I could not get uniqueness error of part already available in Windchill.

This API of checkout gives no success as I could see that aliased URL for part model is from workspace rather than Windchill product or library.

How to avoid this issue as without checkout of part, I would not be able to checkin assembly.

Any thoughts will be useful to us.

Thanks in advance...!

Regards

Ketan