Contract disappears going to vehicle assembly

[Jeltz]

Contract disappears after accepting it when you go to vehicle assembly. Strangely you can still fulfill the contract and get science points for it, it just does not appear as an active contract or later in the contract archive (mission control).

Only error in output .log is

ArgumentException: An element with the same key already exists in the dictionary.
  at System.Collections.Generic.Dictionary`2[System.String,System.Int32].Add (System.String key, Int32 value) [0x00000] in <filename unknown>:0 
  at Contracts.ContractSystem.LoadContractWeights (.ConfigNode gameNode) [0x00000] in <filename unknown>:0 
  at Contracts.ContractSystem+    .MoveNext () [0x00000] in <filename unknown>:0 
  at UnityEngine.SetupCoroutine.InvokeMoveNext (IEnumerator enumerator, IntPtr returnValueAddress) [0x00000] in <filename unknown>:0 
 
(Filename:  Line: -1)

Where should I look to redress the LoadContractWeights issue that seems to cause this bug? Looks like it might just be a file entry missing/duplicated somewhere.

 

UPDATE: Thanks for all the replies. The installation was stock and the problem went away with the loud and clear update.

I confess to doing some preliminary looking around in anticipation of writing a mod and do not recall changing the stock install, and steam validated the files.
Examining the forums though, this problem is only really happening on modded installs so maybe  stuffed up somewhere.
Anyway, All good now and I can get on with my Kerbal career!

Edited November 2, 2016 by Jeltz
Updated info

[JPLRepo]

Are you sure this is in stock? with a stock only save?

 

[sal_vager]

If you could please supply your save with your logs that would help a lot @Jeltz, you can upload the files to dropbox or a google drive then post the sharing links here.

[Jeltz]

Sal_vager,

Thanks for offer, problem solved (or at east went away) with the recent 1.2 Loud and Clear update.

My recommendation to others with this sort of problem is to revert to clean install.