Mass import of transports - common issues

Hi,

We are performing our due diligence to mass import transports into production on our ECC system. This is mainly due to the number of transports that have to be brought into the system during a project or a maintenance/functional release. What are some of the most common issues you have encountered in mass imports and what were your resolutions to those?

If anyone is aware of any "lessons learnt" documents on this subject, please point me to their location.

Thank you,

mike