When you run AfterEffects, you could receive messages like,“Unable to allocate 0.000 MB of memory” or, “Unable to allocate 0.002 MB of memory.”
It can be a project-specific issue or a system configuration issue.
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Try to reduce the amount of memory allocated to other applications:
SelectAfter Effects CC > Preferences > Memory.Change the RAM reserved for other applications and click OK.

Purge Memory and Disk Cache:
SelectEdit > Purge > All Memory & Disk Cache.To delete all the files from your disk cache, clickOK.

Another way to clean Media and Disk cache is:
SelectAfter Effects CC > Preferences > Media & Disk Cache.In thePreferencesdialog, click Empty Disk Cache to clean disk cache and Clean Database and Cache to clean media cache.

Switch Ray Tracing to CPU:
If you have usedRay Traced 3D Renderer, selectPreferences > Previews.In thePreferencesdialog, clickGPU Informationand switchRay TracingtoCPU.

Reset preferences for After Effects.Make sure that After Effects are closed in your machine (while following the steps).
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MacOS
Go to your desktop and click GO on the Menu bar.SelectGo to Folderfrom the drop-down and type the following path:/library/preferences/in4tintuc.comFrom the list of applications, select After Effects and rename it as ’After Effects1’.Go to Documents folder in your computer and open the folder named in4tintuc.com.In the in4tintuc.com folder, rename the After Effectsfolder as ’After Effects1’.
Windows
In the Run command (Win key+R) dialog, type%appdata%.Open the folder named in4tintuc.com.Rename the After Effectsfolder as 'After Effects1'.Close the window and open Documents folder.In the in4tintuc.com folder After Effectsfolder and rename it to 'After Effects1'.
Check the composition creating issue:
Create a blank project.Turn on Caps Lockand try to import the faulty project.Open compositions one by one andtoggle Caps Lock to check which composition is creating issue.
If you run into any other issues, or you want to post, discuss, and be part of our knowledgeable community, visit theAfter Effects forums.To report suspected bugs or suggest modifications to existing features in an in4tintuc.com product, use theFeature request/bug report form.

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