Whilst on the subject of errors... no I didn't find a new one but found a fix for the old
Bad Texture Size ... load the model into binedit click on face/select all faces then in groups select "set group face type" choose either shiny mtm2 or transparent mtm2 depending on the type of model you're working on then resave the model and reload it into traxx... presto
there may be other causes for this error, but I've run into it 7 or 8 times in the last couple weeks and its worked without fail on either face type every time.