Printrun - Print in shell (command line) script

I've been using pronterface for a while without problems. I decided that I would try to script running a print, but haven't succeeded yet. I'm doing this because I have a heated build platform that is externally powered. My script will A)Turn on platform Wait 10 minutes C)Print

It looks like printcore.py is the correct command-line utility to use. Has anybody used this successfully? Here is an example of what I've tried:

python printcore.py -b38400 -v -s /dev/ttyUSB0 ~/prints/thefile.gcode

My results are a mixed bag.

• Sometimes it makes it to "Progress 00.0%", but does nothing. The hot end temperature never actually changes.
• Sometimes it makes it to "Progress 00.0%" and then exits.
• A few times I have tried using the command line interface, it has looped forever and spat out an endless loop of output. Among this was the error: No Checksum with line number

Considering that I've used pronterface and pronsole without problems, I am confused as to why I'm having any problems.

I was briefly looking through the files trying to help you figure this one out. I don't know what exactly is causing your errors.

But I'm curious if you could do what you are attempting simply by appending some g-code to the beginning of the print in your slicing software?

Anyways, I couldn't find a useful manual or help file on printcore.py.

As a linux geek it helps to make sure file permissions aren't an issue. What happens if you run your command with "sudo"?

Other than that I really can't help, hopefully someone who knows the ins and outs of the command line variants of this package can help here.