The "Can't use Roto Brush tool" warning is rarely a fatal error; it is almost always a . By systematically checking your layer type (Footage vs. Text/Shape), turning off Guide Layer status, and ensuring your footage is a standard codec, you will get the Roto Brush back up and running in seconds.
Unlike generic "low memory" errors, code is often related to:
Have you encountered a different error number? Share your specific After Effects version and layer type in the comments (or community forums like the one referenced by 14035589) for more targeted help.
Remember that error codes like 14035589 are often generic, so don't obsess over the number itself. Focus on the underlying causes: cache corruption, GPU incompatibility, or problematic footage.
By following these tips and troubleshooting steps, you should be able to get the most out of the Roto Brush tool in After Effects and achieve professional-looking results.