Please take care of the following points for GSM 1 field :
Visible to the profile being used by the user signed in to the Data Loader: check the field level security; if it worked in sandbox and not in production, check the differences between sandbox and production's profiles and field level security
Not deleted
Spelled correctly in the .sdl file
Please let me know if you need more information on this.
Please take care of the following points for GSM 1 field :
Please let me know if you need more information on this.
Thanks,
Abhishek Bansal