I finally sorted out the two issues I was having and was able to upload. One, the invoice date was not in TEXT format, and in mm/dd/yyyy format. Two, a single email showed a dingbat next to it in the Paypal review pane. I corrected this by opening up the batch upload file, pasting a known good cell atop that bad cell, then manually writing in the email atop that. The way I was able to finally find these was to strip out all but a SINGLE row in the upload file, and keep testing things until that finally went through. Also, there was no daily upload limit that I could detect, once these were finally resolved. I uploaded $9k worth of invoices, about 160 invoices in several batches, without a glitch. Dear Paypal, Please create an upload file evaluator tool that actually works!!! One that scans for these types of errors. At no point in this entire process did I get any response, warning, feedback, email, pop-up window or anything else from Paypal indicating what the problem with my upload file was. In fact, I got the opposite, every single time: a message stating that my file was good to go!!
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