Line Number is not last line number and random pauses
I have just gotten into 3d printing and am trying to use Repetier as a software to print my designs from. It works great about half the time, but the other half of the time my 3d printer will randomly pause in the middle of the print and I will have to start from scratch. On top of this, Several prints come out very messy and take up a lot of time because I get hundreds of messages stating "Line Number is not last line number" and it resends and then moves onto the next line. While printing, It is noticeable because it prints a line, pauses, and then prints the next line, and pauses again. Why do half of my prints work great and the other half not work at all? Thanks for the help!