Inconsistency in subcontracting order

Hi,

I am having below scenario.

1. I am copying subcontracting orders from simulation version to active version due to some business requirement.
2. SNP Subcontracting purchase requisition is created using BAPI in 000 version.
3. Once the Subcon PR is created subcon planned order is generated at the vendor location.

Issues:

1. The dependent demand is not getting generated at the vendor location for component even after the planned order getting created and picking the PDS.
2. I am not able to upload reservation (category BD) for component from plant to vendor, is there any function module for reservation or an alternate way to generate reservation for component.

Experts, request to provide your inputs on the above scenario.

Thanks,

Sanjog Mishrikotkar