How to solve System.Runtime.InteropServices.COMException (0x800A1401)

Solution for How to solve System.Runtime.InteropServices.COMException (0x800A1401)
is Given Below:

I’m trying to open a word document by using interop we get this error in some of the PCs? How can we solve it.

We have free space in memory and desktop.
We try also to update users in DCOMCNFG to IIS application pool admin. but Error still exists.

System.Runtime.InteropServices.COMException (0x800A1401): Word experienced an error trying to open the file. Try these suggestions. * Check the file permissions for the document or drive. * Make sure there is sufficient free memory and disk space. * Open the file with the Text Recovery converter. (\...TEST WoRD FILe form servr.docx)