gridimage error,

ashraf <[email protected]>
Newsgroups gmane.comp.gis.gmt.user
Message-ID <[email protected]>
Dear All
Greetings
Here is the message error, i got it when trying to run gridimage command to
grid file

 
grdimage: Allocates memory and read intensity file
grdimage: project grid files
grdimage: GMT_grd_project: Output grid extrema [-5920/3685] exceed extrema
of input grid [-4099/3685]
grdimage: GMT_grd_project: Output grid extrema [-1.96816/1.77681] exceed
extrema of input grid [-0.999987/0.99997]
grdimage: Evaluate pixel colors
 PSL:C:\progs_cygw\GMTdev\gmt5\tags\5.1.0\src\pslib.c:4687: Too many colors
to make colormap - using 24-bit direct color instead.
PSL:C:\progs_cygw\GMTdev\gmt5\tags\5.1.0\src\pslib.c:4687: LZW compressed
60900 to 37119 bytes (39.0% savings)
"

I thought the cause of maths of grid file, but dont know how to fix it and
also the complete process not completed, just 39.% saving.

Any one Can give me more information's to fix it 

Kind regards
ashraf

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