Help! My sprite doesn't have an embedded pallette!

[JustLate]

I've changed the sprite for the player in my pokecrystal hack. Unfortunately, when I compiled it I received this error:
rgbgfx -c embedded -p gfx/trainers/cal.gbcpal gfx/trainers/cal.png FATAL: `-c embedded` was given, but the PNG does not have an embedded palette! Conversion aborted after 1 error make: *** [Makefile:318: gfx/trainers/cal.gbcpal] Error 1
Does anyone how to embed a pallette in a PNG?

 

[Anon822]

I've changed the sprite for the player in my pokecrystal hack. Unfortunately, when I compiled it I received this error:
rgbgfx -c embedded -p gfx/trainers/cal.gbcpal gfx/trainers/cal.png FATAL: `-c embedded` was given, but the PNG does not have an embedded palette! Conversion aborted after 1 error make: *** [Makefile:318: gfx/trainers/cal.gbcpal] Error 1
Does anyone how to embed a pallette in a PNG?

You need to index the image.