ERROR_IS_SUBST_TARGET 0x80070095

Error code 149 · HRESULT 0x80070095

WINDOWS

An attempt was made to join or substitute a drive for which a directory on the drive is the target of a previous substitute.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_IS_SUBST_TARGET is a Windows error code (system error 149, returned as HRESULT 0x80070095) reported by Windows. Its official message is: “An attempt was made to join or substitute a drive for which a directory on the drive is the target of a previous substitute.”

How to fix ERROR_IS_SUBST_TARGET

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_IS_SUBST_PATHERROR_IS_JOIN_PATHERROR_IS_SUBSTEDERROR_IS_JOINEDERROR_DIR_NOT_EMPTYERROR_PATH_BUSYERROR_SYSTEM_TRACE

Source: Microsoft WinError.h

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