# Error messages -the second

**URL:** <https://community.mrtrix.org/t/error-messages-the-second/658>\
**Category:** Uncategorized\
**Created:** [January 12, 2017, 10:48pm UTC](https://community.mrtrix.org/t/error-messages-the-second/658 "2017-01-12T22:48:02Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![rehappydoc](https://community.mrtrix.org/user_avatar/community.mrtrix.org/rehappydoc/32/426_2.png) [@rehappydoc](https://community.mrtrix.org/u/rehappydoc)\
**Post date:** [January 13, 2017, 5:32am UTC](https://community.mrtrix.org/t/error-messages-the-second/658/2 "2017-01-13T05:32:21Z")

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I have solved this problem after reading the previous question. [ERROR message](https://community.mrtrix.org/t/error-message/175)

The common situation of both cases is the data in the portable hard disk.

The command “dwipreproc” may not work for data in the portable hard disk. After transferring data to the hard disk of the main computer, all error messages were gone.

But one question still remains. What did make the error messages in the course of processing data in a portable hard disk?

Best,

Rehappydoc

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