But any way, I have migrated huge data from Windchill to Teamcenter.
I used ETL approach. E - There were couple of tools used from Windchill to extract the metadata and physical files. One OOTB was WBM others were custom developed inhouse. T - A custom built transformation utility for transforming the data. We did not use the commercial application available in the market, we built one for our self. T - And a custom wrapper application to load the data into Teamcenter. Most of the OOTB utilities, plmxml utilities, CREO integration utility were used.