Goto to the Edit Menu and PUrge All. IF that doesn’t help then try to restart AE and render it again.
IF that also fails then look at the documentation for Secret Memory settings to purge every other frame.
And if that fails, then report back with information on the size of your comp and the plugins you used. Also take note if the error comes up intermittently or at a specific frame.
Good Luck!
RoRK
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