Error, accessing the file

[russ75]

Hello,
I'm brand new here.

I recently updated a 2023 version of ASTAP to version 2025.11.28. The previous version had no problem loading TIFF files. Now, however, whenever I try to load a TIFF file, I get the following message: "Error, accessing the file!" A screenshot of the error message is attached.

I'm using a Windows 10 PC.

Any help would be appreciated.

Russ

[han.k]

Hi Russ,

ASTAP can not read 32 bit tiff's. Only 16 bit. Can you check it in an other program what type of TIFF it is? ASTAP can also no read DSS files since the write in a very rare format. This all hasn't changes since 2023.

Can you send my one sample TIFF? You probably attach it here in your reply. I will download and delete it.

Han

[russ75]

Thank you Han. I just tried to attach a sample TIFF, but was unsuccessful as the size is 36 mb. I will check on the type of TIFF file.

[russ75]

I just opened the TIFF file in GIMP. It appears to be a 16 bit TIFF if I am reading the information correctly.

Screenshot attached.

[han.k]

Upload a sample TIFF to something like:

https://wormhole.app/

and send me the link. Use no emails.

[russ75]

Han,

You were correct, the TIFF was created in DSS. I just converted it into a FITS file in GIMP and ASTAP opened it no problem. I will just convert all my DSS TIFFs to FITS before loading into ASTAP. I guess the problem is solved although I'm still puzzled why the TIFF opened in ASTAP this morning in the 2023 version, but not now with 2025.11.28.

Here's the link for the uploaded image:
https://wormhole.app/4xkRYl#3PhXFp4J4JIK2zi04EA51w

Russ