Can't seem to repackage png's

I've been working on adding a bit more crops and fish and things to my game, but when I went to repackage I've found that xnb_node doesn't want to repackage any of my PNG's back to xnb. It either stops working and hangs on the command, or gives me this error

http://pastebin.com/h2BtDeGw

Not really sure what it is that I'm doing wrong, and I'd be very appreciative if someone could help me out.

 

it should be xnb_node.cmd pack Modding\Test\Crops\crops Modding\Crops.xnb

 

There has to be an input and an output argument or xnb_node doesn't work though?

 

when you unpack a xnb into a png it comes with two files one with the info to repack it. it should be named "crops" and "crops..png'. you will need to repack the "crops" file since that has the information on what the program should do.

 

I'm getting the exact same error and can't fix it.

 

I got that today. The only way to workaround it for me was to repackage the entire portraits folder instead of an individual file...