A quick sanity check for an XMT_TXTQUO file is a safe way to verify that it’s probably a Parasolid transmit CAD format, with the first clue being where it came from—engineering workflows or CAD-related senders usually imply 3D geometry—followed by checking the file’s Properties for size hints, and finally doing a non-destructive peek in a text editor to see if structured text appears, making sure not to save or allow reformatting.
If everything looks unreadable, that doesn’t automatically mark it as faulty because many Parasolid transmit files are binary, so your next logical step is still to load it into a Parasolid-capable CAD program; for a safe technical glance, PowerShell can reveal early text lines or show hex bytes to help you understand the format, and if the file doesn’t appear in the CAD tool’s picker due to extension filtering, creating a renamed .x_t copy allows it to be selected without affecting the data itself.
XMT_TXTQUO functions as a Parasolid transmit-text exchange format for sharing 3D CAD geometry among software that reads Parasolid, effectively putting it in the same family as .X_T (and binary siblings .X_B / XMT_BIN), with most programs interpreting it as another Parasolid text transmit rather than a separate model type, which aligns with its appearance beside X_T under the MIME type `model/vnd.parasolid.transmit-text`, designating it a Parasolid text file.
The name appears “odd” because certain ecosystems avoid the standard `.x_t` and adopt multi-part extensions like `XMT_TXT…` to indicate “Parasolid transmit” and “text,” with the trailing piece (for example QUO) simply serving as an internal variant marker, and what actually matters is that the file remains Parasolid text transmit geometry, so you should open it in a Parasolid-reading CAD program, or if it’s filtered out, make a duplicate and rename that copy to `.x_t` so the software detects it.
Opening an XMT_TXTQUO file usually involves working with it like a Parasolid text-transmit file and choosing any CAD tool that reads Parasolid, with programs such as SOLIDWORKS, Solid Edge, or NX letting you import it the same way as a normal .x_t—use File → Open/Import and either select Parasolid or show All files; since many tools filter by extension, the practical fix is duplicating the file, renaming the copy to .x_t, and importing that, which leaves the underlying geometry unchanged.
If you aren’t running a full CAD suite or just want to view/convert the geometry, a CAD translator/viewer offers the least-complicated method: import the file and save it as STEP (.stp/.step), which is widely supported; if every program rejects it, the cause is often a binary Parasolid mislabeled by extension, an incomplete/corrupt file, or missing auxiliary files, making it wise to ask the sender for a STEP export or verify what software generated it before retrying.
