Auto PO for third party sales

Hello All,

I have created a third party sales order and the PR has been generated successfully.

When I am using ME59 the PR is being converted to PO but when I am using program SE38 and executing program RM06BB20 I am getting the error No suitable PR found.

Similarly when I creating a PO manually using ME21N by referenceing and adopting the PR details everything is working fine.

What can be the problem.

Automatic PO has been ticked in Sales Item category,Vendor Master,Material Master and source list and info record has been created.

Why is this so and moreover there are no enhancements in the programs.

An early help will be highly appreciated.

Regards.

Saurav.