Hi,
I work for QHYCCD company and also develop Java software for them and TSX pluging. Yesterday, I have noticed the same problem you have explained here after uploaded the latest version from the QHYCCD SVN repository, so all my applications stopped working. So, the current version of the driver returns zero detected cameras even if some are visible on the bus using lsusb command.
I have already reported this bug to quy who is developing their driver. He told me, he had several times changed scan usb function so, he is looking on this problem to fix it asap. Sorry for that problem, maybe you could download older driver.
Than you,
Jan

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