# Local Haddock run - The following floating-point exceptions are signalling: IEEE\_DIVIDE\_BY\_ZERO

**URL:** <https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008>\
**Category:** HADDOCK\
**Created:** [May 14, 2024, 2:54pm UTC](https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008 "2024-05-14T14:54:45Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![rpgv2000](https://avatars.discourse-cdn.com/v4/letter/r/8dc957/32.png) [@rpgv2000](https://ask.bioexcel.eu/u/rpgv2000)\
**Post date:** [May 14, 2024, 2:54pm UTC](https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008/1 "2024-05-14T14:54:45Z")

</div>

Hello,  
I am currently attempting to perform an ab-initio DNA-Protein docking. I was testing with a PDB file from PDB, that I split into individual nucleotide and protein files.  
The process ran up until:  
‘’’  
Note: The following floating-point exceptions are signalling: IEEE\_DIVIDE\_BY\_ZERO

```
calculating structure 12
  queue command:
 ------------------------------------------------------------

```

Structure 2: running  
Structure 3: running  
Structure 4: running  
Structure 5: running  
Structure 6: running  
Structure 7: running  
Structure 8: running  
Structure 9: crashed  
Structure 10: running  
Structure 11: running  
Structure 12: running  
‘’’

The FAILED file displayed the following repeatedly:  
‘’’  
%EVALUATE-ERR: EVALUATE assignment aborted.:  
evaluate ($resid2=encode(decode($resid1)+1))  
^  
%XRDECODE-ERR: Illegal argument(s).:  
evaluate ($resid2=encode(decode($resid1)+1))

%PARSER error encountered: Encountered too many parsing errors.  
‘’’  
I don’t understand what this could mean, and haven’t yet found references on it.  
I would greatly appreciate some help!  
Thank you in advance !!

---

<div class="post-metadata">

**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [May 14, 2024, 5:18pm UTC](https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008/2 "2024-05-14T17:18:40Z")

</div>

CNS is stopping because of too many parsing errors. This points to possible errors in run.cns (e.g. missing quotes and such)

Check carefully the file you must have edited

---

<div class="post-metadata">

**Author:** ![rpgv2000](https://avatars.discourse-cdn.com/v4/letter/r/8dc957/32.png) [@rpgv2000](https://ask.bioexcel.eu/u/rpgv2000)\
**Post date:** [May 15, 2024, 6:43pm UTC](https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008/3 "2024-05-15T18:43:36Z")

</div>

Hello, thank you so much for your quick response !  
I checked all the fields I initially modified for ‘syntax’ errors, and haven’t found any.  
I attempted a fresh run, modifying carefully the required parameters and it led to the same result.  
After some attempts,I tried with another complex and it worked.  
I suspect it was due to PDB formatting, would that make sense?

---

<div class="post-metadata">

**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [May 16, 2024, 7:04am UTC](https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008/4 "2024-05-16T07:04:41Z")

</div>

Yes - bad PDB format will also cause issues…

Best to check and fix the PDB format with our pdb-tools

---

<div class="post-metadata">

**Author:** ![rpgv2000](https://avatars.discourse-cdn.com/v4/letter/r/8dc957/32.png) [@rpgv2000](https://ask.bioexcel.eu/u/rpgv2000)\
**Post date:** [May 20, 2024, 11:41am UTC](https://ask.bioexcel.eu/t/local-haddock-run-the-following-floating-point-exceptions-are-signalling-ieee-divide-by-zero/5008/5 "2024-05-20T11:41:43Z")

</div>

Indeed it was an insert error;  
pdb\_fixinsert, solved it !!

Thank you so much!