Hullo all!

I am having problems to compress TIFF files.
The error message is : "Could not read line from input image file"
Internal error: "Invalid parameters, file path is NULL or does not exist".
The message appears at the beginning or at the end of the process.

I organized my TIFF files using Virtual Datasets:

- 9 tiff files compose a VIRTUAL DATASET. I get around 200  VDS from adjacent 
geographical places
- Next I compose a new VIRTUAL DATASET which calls to nine of the previous virtuals 
and zoom over one (in this way I get an area which is surrounded by the rest of 
Virtuals)
- the virtual is sent to compress.

The surprising thing is that some of the virtuals were compressed and some other not.

It is supposed that tiffs could be corrupted but:

- when I compressed the tiff files from a single virtual or directly I did not have 
any problem
- when decreasing the zooming area over the required virtual the ecw was made but I 
could not displayed it.
- when compressing the virtual which could be generating the error. The compression 
was succesfull and displayed anyway. 

Any suggestions??



Antonio Jos� Rodr�guez P�rez

Empresa P�blica para el Desarrollo Agrario y Pesquero S.A.
Departamento de Innovaci�n y Desarrollo
Servicio de Informaci�n del Territorio
C/ Bergant�n n� 39
41012 Sevilla

Tel: + 34 954938100
Fax: + 34 954938110


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