Not enough memory (RAM) - opening large file with sufficient HW

Question

Hi,I am into astrophotography and therefore I work on large TIFF files. The normal file has 12989x8709 pxs and is 32bit (file-size app. 1 GB).If I try to open such a file in Photoshop CC 2019 (20.0.4), I get the message that it's not possible to open the file, because theres not enough RAM. I am able to open such TIFF images when their file-size is around 600 MB.As a workaround I use Illustrator to import these 1 GB files, and then export them in 16bit color. This reduces their file-size to app. 600MB.But this is still strange - my PC is quite strong and shound be able to handle the big files as well:Intel I7 479032 GB RAM (performance setting 75% = 22.462 MB RAM availabe to Photoshop)500 GB free SSD space (on PS working volumes).. and my environment reserves only 4-5 GB for running Windows 10 and relevant apps.I have been reading all threads I could find there's nothing which solves my issue - regarding the memory error on opening Images.Any ideas?Thanks,Sventypos removed

svenh4250239 · Accepted Answer

A shot is the dark, but does turning off »Use Graphics Processor« in the Performance Preferences (Photoshop > Preferences > Performance > Graphic Processor Settings) and restarting Photoshop have any bearing on the issue?

What a search… after 2 days I finally found it.

Here's the solution:

I said I am into astrophotography. I use the program Deep Sky Stacker to merge a large number of images (so-called "lightframes", "darkframes", "flatframes" and "biasfrmes") into one.

Deep Sky Stacker produces an output-file, which is called "autosave.tif" in the folder, where the lightframes are. This TIF-file is not compliant with floating point or rational TIF, an therefore can not be analyzed by Photoshop correctly.

Trying to open the autosave.tif in Photoshop leads to the error message "not enough memory (RAM)".

Instead, one has to wait until Deep Sky Stacker has openend the file after stacking. Then you are able to use the Dialog "Save as" on the left side.

Selecting one of the TIF 32bit formats (rational or integer) as shown above allows to save a TIF-file which can be openend by Photoshop.

Regards and thanks for your efforts,

Sven

thomasl94111804 · Answer

Thank you so much for this post, just what I was looking for! I proccess files using DSS and save them as TIFF files, but was getting the same exact error in Photoshop. Thanks again!

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