SimpliGen Docs
Troubleshooting

Out of memory / stuck generations

What to do when a generation runs out of VRAM or appears stuck.

A video generation fails immediately at 0%

This usually means the GPU ran out of memory before it could start.

Fix: Close other GPU-heavy apps, choose a lower resolution or shorter clip, or pick a lighter preset. After an out-of-memory error, restart the engine before trying again.

A generation sits "stuck" near 80% for a long time

On cards with limited VRAM, the final decode step can fall back to the CPU, which is slow but usually finishes. It can take a long time on long or high-resolution clips.

Fix: Let it finish if you can, or next time use a shorter duration / lower resolution. Cloud generation avoids this entirely.

A cloud generation timed out

Very heavy settings (long duration at the highest resolution) can exceed the time limit.

Fix: Reduce the duration or resolution. If you were charged for a generation that produced nothing, it is automatically refunded; if not, contact support.