Did you solve it jgm39? I have the same problem at the moment. Tks a lot

You can open the file in ENVI Classic, then go to Edit Header->RPC/RSM Emulation. Turn this on to update the header. The file should now show with RPCs. Save out the file to ENVI format to use in ENVI or use the Orthorectification tool in ENVI Classic.

Thank you Mari. I went to RPC/RMS Emulations and appears the following message: "Procesing level: Input SPOT file must be level "1A" or "1B" and then ask me for the RPC file. I only have the .dim and tif files. Could you help me with others alternatives?. Tks a lot again.

Perhaps your data is a higher level that is already orthorectified, so it is not necessary?

Thanks Mari. The images has a pre processing level. But in ENVI for a Rigorous Orthorectification you need the metadata.dim (DIMAP version='1.1' only) https://www.harrisgeospatial.com/docs/SupportedImageFormats.html. (XML version attribute must be version=1.1). I have de versión 1.0 and I do not how I can change it.

Rigorous Orthorectification does require a specific type of metadata in order to use. If you do not have the required level, you cannot use the rigorous ortho.
Did you try opening your data in ENVI Classic as described above and turn on RPC emulation? If this does not work, then the only other option you could use is the Build RPCs tool. I would save my data to ENVI format first, then use Build RPCs where you select GCP points in your image as well as elevation from a DEM to generate RPCs.

http://www.harrisgeospati...cs/BuildingRPCs.html