printer.pltcfg + Colorwave 300 generates 0 kB plt files sometimes

Hello,

tried to use ColorWave 300 Windows driver connected with slightly modified printer.pltcfg - configured to always create a plot file. In general, works good, but sometimes it generates 0 kB file and immediately plots 1 copy directly onto machine. The printing result is OK, as expected.

No general rules connected with file was observed, but it happens only with some raster files (not all rasters, only from time to time -can't discover any specific attributes connected with that particular rasters). Our raster are small (b&w tiff's). "Rasterized" check-box does not have any influence on that behaviour.

Any ideas for that?

All the best, Wojtek