I was having a problem getting the Brother QL-500 to print shipping labels. The size is set for 2-3/7" continuous labels, but the software generated 2-1/8" inch labels (Brother says that size does not exist). The printer wouldn't print, saying "The roll of labels or tape inside the machine does not matches [sic] the one selected in the application." After many calls & frustrating hours, I was able to find a workaround by placing a small square of cardboard underneath the label spool, toward the back, so that the back 3 pins were covered. This tricked the printer into thinking it had 2-1/8" inch labels installed, and the label printed immediately. Hope this helps someone else.
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