TerraSAR-X Terrain Correction Error

TerraSAR-X images and Range Doppler Terrain Correction, I get this error message:

What’s wrong?

Possibly the input product type.

which product level did you order? SLC, MGD, EEC, GEC?

Product level is GEC.

that means there is already a projection in the data, so Range Doppler Terrain Correction can not be applied.

Do you have the chance to get the data in SLC format?