Bugs: mkexpmap

The CIAO response tools will issue this warning if the CYCLE keyword is missing from the file header. The CYCLE keyword is needed in alternating mode observations (also referred to as interleaved mode) to indicate which frame time was used in the file. If you are not working with interleaved data, you can ignore the warning.

The What is the CYCLE keyword? FAQ explains further about this keyword.

The GRATING keyword in the output file is not copied from the input instrument map; it is always set to NONE. The output pixel values are correct, just this keyword is in error.