What is the exact error message returned by the envi_output_to_external_format routine ?

When i run, it's .hdr no problem. But function export .tif format error: tiff_write_file_doit: An error has occurred during processing. Error attempt to subscript ENVI_FILES(ENVI_FILES_COMMON) with INDEX is out of range". The result may be invalid and then, i check file, it's created, but when i open it, it's problem it's error:\ File: C:\temp\A2012140_2005.hdr warning: The dimensions and data type of the given file are inconsistent with the actual size file. Please Correct Can you help me? Thank you

It seems we can't see the images including in your post. Could you make a text copy of the error message? Thanks

Hoa Le wrote: When i run, it's .hdr no problem. But function export .tif format error: tiff_write_file_doit: An error has occurred during processing. Error attempt to subscript ENVI_FILES(ENVI_FILES_COMMON) with INDEX is out of range". The result may be invalid And then, i check file, it's created, but when i open it, it's problem it's error: File: C:\temp\A2012140_2005.hdr warning: The dimensions and data type of the given file are inconsistent with the actual size file. Please Correct Can you help me? Thank you

I think you need to set up an r_fid from the math_doit to pass to the output_to_external_format: ; Perform the band math processing envi_doit, 'math_doit', $ fid=t_fid, pos=pos, dims=dims, exp=exp, out_name=out_name, $ r_fid=r_fid envi_output_to_external_format, /tiff, FID=R_FID, pos=pos, dims=dims

Thank you very much. I can do it :-)