A quick sanity check for an XMT_TXTQUO file is a protective initial step that it’s probably a Parasolid transmit CAD file, beginning with context clues from engineering or
CAD-related senders, then reviewing Windows Properties for size indicators, and if desired, opening it in a plain text viewer to look for structured text associated with transmit forms, being careful not to save or let any program modify the file.
If the file looks like nonsense symbols, that can simply show it’s a binary format, and the correct workflow is still to try importing it into a Parasolid-compatible CAD application; if you want a technical but safe preview, PowerShell can display first-line text or hex bytes, and when CAD software filters by extension, duplicating and renaming the copy to .x_t makes it visible in the Open dialog without altering the original contents.
XMT_TXTQUO operates as a Parasolid transmit-text file used for exchanging 3D CAD geometry across applications that support Parasolid, effectively placing it in the same group as the standard .X_T format (and binary variants like .X_B / XMT_BIN), and most software recognizes it simply as another Parasolid text-transmit form, reflected by its inclusion with X_T under the MIME type `model/vnd.parasolid.transmit-text`, which identifies it as a Parasolid model file.

It looks nonstandard because certain toolchains skip the traditional `.x_t` and opt for descriptive compound extensions like `XMT_TXT…` to flag "Parasolid transmit" plus "text," while the ending (such as QUO) is merely a system-dependent variant label; practically the file remains Parasolid text geometry, so you should open it with a CAD application that supports Parasolid, or if it doesn’t appear in the dialog, rename a duplicated copy to `. If you have any thoughts pertaining to in which and how to use
advanced XMT_TXTQUO file handler, you can get hold of us at our own web site. x_t` to help the software detect it.
Opening an XMT_TXTQUO file generally means approaching it as a Parasolid text-transmit file and importing it using Parasolid-compatible CAD software—SOLIDWORKS, Solid Edge, or Siemens NX—via File → Open/Import and either choosing Parasolid or switching to All files so it loads like a standard .x_t; when the extension is filtered out, the simple workaround is to make a copy, rename that copy to .x_t, and import it unchanged.
If you don’t need full CAD editing and only require viewing or conversion, a CAD translator/viewer makes the process straightforward: open the file and convert it to STEP (.stp/.step), which practically all CAD tools can read; if the file won’t open anywhere, it’s usually a binary Parasolid under a different name, a damaged file, or something depending on sidecar files, so the safest action is to get a STEP export from the sender or confirm the originating system and try again.