Darkroom Error: OBT File Cannot Be Read
If the error above is seen in Darkroom (usually accompanied by an order that has disappeared), the order file with extension .obt is most likely corrupt and unrecoverable.
In the same referenced directory, there should be another file of the same name ending in .obt.TMP, which is a backup of the order file.
To try to recover the order, with Darkroom closed, make a copy of the .obt.TMP file, then rename the original, removing .TMP, and reopen Darkroom.
IF the .tmp file is good, the order should reappear on one of the Orders page.
(Note: these files are very small, but should be at least 1kb in size.)