# WHISCY - Errors in error.log **URL:** \ **Category:** HADDOCK\ **Created:** [March 31, 2021, 1:42pm UTC](https://ask.bioexcel.eu/t/whiscy-errors-in-error-log/2881 "2021-03-31T13:42:56Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dgeggerm](https://avatars.discourse-cdn.com/v4/letter/d/3e96dc/32.png) [@dgeggerm](https://ask.bioexcel.eu/u/dgeggerm)\ **Post date:** [March 31, 2021, 1:42pm UTC](https://ask.bioexcel.eu/t/whiscy-errors-in-error-log/2881/1 "2021-03-31T13:42:57Z")
Hi all, I am trying to predict protein-protein interfaces using WHISCY in order to obtain lists of active and passive residues to supply into HADDOCK. However, my WHISCY runs consistently fail and give an error message (see below), even though I use a standard PDB ID together with the corresponding HSSP alignment. I checked this alignment and it had over 180 sequences. Does anyone has an idea what this error message means and how I could solve it? Thanks in advance! ![Capture](https://europe1.discourse-cdn.com/flex013/uploads/bioexcel/original/1X/8d333cd7cfac1ca52b66de4628ec9b2e67629465.png) ---
**Author:** ![honoratorv](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/honoratorv/32/672_2.png) [@honoratorv](https://ask.bioexcel.eu/u/honoratorv)\ **Post date:** [April 1, 2021, 5:04pm UTC](https://ask.bioexcel.eu/t/whiscy-errors-in-error-log/2881/2 "2021-04-01T17:04:36Z")
It seems that there are `UNK` residues in your protein. Try removing them and submiting again…! ---
**Author:** ![Aron\_1226](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/aron_1226/32/918_2.png) [@Aron\_1226](https://ask.bioexcel.eu/u/Aron_1226)\ **Post date:** [January 17, 2024, 12:04pm UTC](https://ask.bioexcel.eu/t/whiscy-errors-in-error-log/2881/3 "2024-01-17T12:04:30Z")
Hello, I am having the same problem, I am using a PDB file from AlphaFolds. Have you already fixed this problem??