[GRASSLIST:3382] (no subject)

[Nivedita Candade]

Hi,
I am using Grass 5 and am encountering errors in running r.out.tiff. I get the 
error 'fatal: libtiff.so: open failed: No such file or directory killed'.
What could be  the problem ?
Also, I tried i.out.erdas but when I tried to bring up the .img file in ERDAS 
8.6, I get the error 'file open error(0) Raster has no layers !'
How can I import GRASS raster file into ERDAS ?? Please help !