How to Handle Long File Paths When Exporting from iManage

If you're an IT admin troubleshooting an iManage export and finding missing files, truncated folder names, or outright errors, there's a good chance you've hit Windows' 254-character practical path length limit.

This is one of the most common — and most frustrating — problems with iManage document exports. Our data shows it affects roughly 20% of all exports. And most export tools simply don't handle it.

Why iManage Exports Hit the Path Limit

iManage allows deeply nested folder structures, and filenames are derived from document profile descriptions — which are often long and descriptive in legal work. A typical matter might have a hierarchy like:

Client Name / Matter Name / Correspondence / External / Opposing Counsel / Smith & Partners LLP / Response to Motion for Summary Judgment - Amended Draft v3.docx

When you export this to your local drive, the full Windows path becomes something like:

C:\Users\jsmith\Documents\Exports\Client Name\Matter Name\Correspondence\External\Opposing Counsel\Smith & Partners LLP\Response to Motion for Summary Judgment - Amended Draft v3.docx

That's easily over 254 characters. Windows' legacy MAX_PATH limit causes the export to either silently skip the file, truncate the path, or throw an error.

The problem gets worse the deeper the folder structure. Deeply nested workspace structures in law firms commonly hit this limit — we've seen iManage structures 12+ levels deep. Because filenames in MatterExport are derived from the document profile description (not cryptic iManage document IDs), they tend to be long and descriptive — exactly what you want for readability, but it pushes paths closer to the limit.

How Other Tools Handle This (Poorly)

Most iManage export tools handle long paths in one of these ways:

• Skip the file silently — The file doesn't appear in the export. No error message, no warning, no log entry. You only discover it's missing when a lawyer asks for a document that isn't there — potentially months later.
• Truncate the filename — The file or folder name is shortened to fit. This "works" in the sense that the file exists, but good luck figuring out which "Response to Moti..." corresponds to which original document.
• Flatten the structure — Nested folders are collapsed into fewer levels, reducing path length but destroying the organizational hierarchy that makes the matter navigable.
• Throw an error and stop — Some tools halt the entire export when they encounter a long path, requiring manual intervention for every affected file.

None of these are acceptable when you need a complete, accurate export for litigation, regulatory compliance, or a departing lawyer's matter handover.

How MatterExport Solves Long Paths

MatterExport uses Windows' extended-length path prefix (\\?\) internally, which bypasses the 254-character MAX_PATH limit entirely. This is a Windows API feature that supports paths up to approximately 32,767 characters — far beyond anything iManage would produce.

MatterExport is a desktop app — no server infrastructure required. It connects to iManage via the REST API and runs on a single machine. In practice, this means:

• Every file is exported, regardless of path depth or name length
• Folder names are preserved exactly as they appear in iManage — no truncation
• The full hierarchy is maintained without flattening or restructuring
• No configuration needed — long path handling is built in and always active

The HTML export report details exactly how many files had long paths and how they were handled, so you have a complete audit trail.

Can't I Just Enable Long Paths in Windows?

Windows 10 (version 1607+) and Windows 11 include a group policy setting to enable long path support system-wide. However:

• Most law firm IT departments don't enable this setting because it can affect other applications
• Even with the setting enabled, many applications (including File Explorer) still can't handle long paths
• The export tool itself must be built to use extended-length paths — enabling the Windows setting alone isn't enough

MatterExport handles long paths at the application level, regardless of whether the Windows group policy is enabled. It works on any Windows 10 or 11 machine out of the box.

How to Check If Your Exports Are Affected

If you've previously exported from iManage using native export or another tool, you can check for missing files:

1. Compare the document count in your iManage workspace against the exported file count
2. Look for folders that seem suspiciously empty in the export but have content in iManage
3. Search for truncated filenames (files ending in "..." or unusually short names)

If you find discrepancies, long paths are a likely culprit. Re-export with MatterExport to get the complete set.

Frequently Asked Questions

How do I know if my iManage matters have long path issues?

If your matters have folder structures more than 4-5 levels deep with descriptive folder and file names, you're likely affected. Matters involving correspondence, opposing counsel folders, and long document titles are the most common cases. Our data shows 20% of exports are affected.

Does MatterExport rename or shorten any files?

No. MatterExport preserves the exact filename and folder name from iManage. The only modification is replacing characters that Windows doesn't allow in filenames (like : or |), which iManage permits in document titles.

What about network drives and UNC paths?

MatterExport's long path support works for both local drives and UNC network paths. You can export directly to a network share or USB drive without path length issues.

Will other applications be able to open files with long paths?

Most modern applications (Microsoft Office 365, Adobe Acrobat, etc.) handle long paths correctly. Windows File Explorer may struggle with paths over 254 characters, but you can navigate to them using the address bar or command line.

Getting Started

Download the free trial of MatterExport and test it with your deepest folder structures. The trial lets you export up to 10 documents per folder — enough to verify that long paths are handled correctly in your environment. No server infrastructure required — it's a desktop app that runs on one machine.

If you're evaluating export tools, see our full comparison of MatterExport, Bundledocs, and DocAuto. For the complete export guide, read How to Bulk Export Documents from iManage Work (2026 IT Guide).