VCOM End of transmission

Dear all,

I used the LPC1778 and I will sending data via USB CDC class. Sending a big amount of data from the device to the host is no problem. The Problem is that I don't be able to detect the end of an OUT transition. The device max packet length is 64 Byte and the host send 138 Byte in the best case the device will get three ISR with 64 + 64 + 10 Byte. How can I knew that the frame ends?

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