Design Resolution for Pants

Hello! I am trying to print down the side of a pant leg. I have a 30" vector file which is more than the size of the print area, and I am getting an error that the resolution is too low. How can I fix this?

Hi! Most likely, the file does not fulfil our requirements for a different reason, and a wrong message is shown.

Could you please send the design file to partner@spreadshirt.net? We will check which requirement was not fulfilled.

Thanks in advance!