A similar UserWarning was discussed under NumPy array Warning · Issue #68 · tbepler/topaz · GitHub.
You may want to
- confirm in the Event Log that Topaz has recognized your GPU device and is not “Falling back to CPU” (as it does in TOPAZ not using GPU)
- confirm the GPU worker has not running out of free RAM or CPU resources
- possibly reduce the Number of parallel processes and Number of CPUs values from their defaults (as discussed in Topaz Preprocessing very slow - #2 by ccgauvin94)