A quick sanity check for an XMT_TXTQUO file is a straightforward verification of whether it’s likely a Parasolid exchange file, starting with its origin since CAD workflows heavily imply geometry, then checking Properties for file-size hints, and finally performing a safe text-view peek using Notepad or similar to see if structured content appears, avoiding any actions that might rewrite or reformat the data.

If it looks like unreadable gibberish, that isn’t proof anything is wrong—it often just means the file is binary or packed, and the correct next step is still to try importing it into a Parasolid-capable CAD tool or translator; for a slightly more technical but safe inspection, you can use PowerShell to show the first text lines or dump a few bytes in hex to distinguish text from binary, and if a CAD program hides the file in its Open dialog due to extension filters, you can duplicate the file and rename the copy to .x_t so the software will accept it without altering its contents.

XMT_TXTQUO represents a Parasolid transmit-text exchange file used for moving 3D geometry across Parasolid-compatible CAD systems, falling into the same category as .X_T (and binary types .X_B / XMT_BIN), with most applications treating it as the same Parasolid text-transmit concept, reflected by its grouping with X_T under the MIME type `model/vnd.parasolid.transmit-text`, which identifies it as a Parasolid text-based model.

It looks unusual because some workflows don’t use the classic `.x_t` naming and instead rely on descriptor-style extensions such as `XMT_TXT…` to convey "Parasolid transmit" plus "text," while the extra suffix (like QUO) is generally just a variant tag specific to the toolchain; operationally it’s still Parasolid text geometry, so your next move is to import it into a Parasolid-compatible CAD tool, and if the file isn’t listed, copying and renaming it to `.x_t` typically makes the program recognize it.

Opening an XMT_TXTQUO file generally means treating 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 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.