I believe I've set the image scale parameters correctly for plate solving and have been able to solve plates with TSX and with All-Sky in Visual Pinpoint. However, during automate runs the plates never solve. There was similar behavior with Acquirestar which I eventually disabled.

Plate-solve pointing image.
386 image stars found
274 catalog stars found
** No matching stars found. Check your estimated center-point RA/Dec, and your image scaling and quality.
Start slew to offset...