Hi Thomas

What changes have been made when this started to appear? Did you create a new document type, which could perhaps contain some special characters like - or _ for instance? Or could it be that there is a content node that has a characters, which is not allowed and needs to be mapped to something else in the /config/umbracoSettings.config?

/Jan

How can i find that? Is there something to enable in order to see it in the log file? I haven't change or enter any new DocumentType. I don't know if the users had enter node or content within a node that probably have special characters. Is there any way to discover and get more information in the log file?

Hi Thoms,

Could it be this issue that you have? http://issues.umbraco.org/issue/U4-3614, I can see that you are using a newer version, but it´s worth checking. Claus did also experience also this error in this thread, perhaps you can set some logging up. Like Claus did https://our.umbraco.org/forum/umbraco-7/using-umbraco-7/63461-String-reference-not-set-to-an-instance-of-a-String

Hope this helps,

/Dennis

Hi Thomas

Unfortunately there is no easy way of figuring this out.

Perhaps you can ask the the client about what new pages has been created and then check to see if they contain some weird character in the nodename.

/Jan

By taking a quick look on their nodes i saw that they are using the following characters in some node names : ; , !

Will this be a possibility to raise that error?

Thank you. I will try to add these characters in umbracoSettings.config and see if that fix the error otherwise i will search for another special characters. Reason for using them? It is a travel portal site and for some node titles they want to mention something special for example and they add these characters. They are users-writers and i cannot change their mind as you can understand. :-)

Hi Thomas

Yeah, writers should not be concerned with tech-stuff like this so doing the replacement is the right way to go. I forgot to mention that after making the changes you'll need to recycle the app pool. Otherwise they don't take effect.

/Jan

Back again and the problem still exists. I add all the following characters in umbracoSettings.config but still i am getting the same error. I download their database locally, search all the node names one by one, i couldn't find any other character that is not included in the following list. The strange think is that running the application locally from visual studio i am not getting this error. In live environment i am getting it.

<urlReplacing removeDoubleDashes="true">
      <char org=" ">-</char>
      <char org="&quot;"></char>
      <char org="'"></char>
      <char org="%"></char>
      <char org="."></char>
      <char org=";"></char>
      <char org="/"></char>
      <char org="\"></char>
      <char org=":"></char>
      <char org="#"></char>
      <char org="+">plus</char>
      <char org="*">star</char>
      <char org="&amp;"></char>
      <char org="?"></char>
      <char org="á">aa</char>
      <char org="Á">aa</char>
      <char org="à">aa</char>
      <char org="À">aa</char>
      <char org="â">aa</char>
      <char org="Â">aa</char>
      <char org="å">aa</char>
      <char org="Å">aa</char>
      <char org="ã">aa</char>
      <char org="Ã">aa</char>
      <char org="ä">ae</char>
      <char org="Ä">ae</char>
      <char org="æ">ae</char>
      <char org="Æ">ae</char>
      <char org="ç">cc</char>
      <char org="Ç">cc</char>
      <char org="é">ee</char>
      <char org="É">ee</char>
      <char org="è">ee</char>
      <char org="È">ee</char>
      <char org="ê">ee</char>
      <char org="Ê">ee</char>
      <char org="ë">ee</char>
      <char org="Ë">ee</char>
      <char org="í">ii</char>
      <char org="Í">ii</char>
      <char org="ì">ii</char>
      <char org="Ì">ii</char>
      <char org="î">ii</char>
      <char org="Î">ii</char>
      <char org="ï">ii</char>
      <char org="Ï">ii</char>
      <char org="ñ">nn</char>
      <char org="Ñ">nn</char>
      <char org="ó">oo</char>
      <char org="Ó">oo</char>
      <char org="ò">oo</char>
      <char org="Ò">oo</char>
      <char org="ô">oo</char>
      <char org="Ô">oo</char>
      <char org="ø">oe</char>
      <char org="Ø">oe</char>
      <char org="õ">oo</char>
      <char org="Õ">oo</char>
      <char org="ö">oe</char>
      <char org="Ö">oe</char>
      <char org="ß">ss</char>
      <char org="ú">uu</char>
      <char org="Ú">uu</char>
      <char org="ù">uu</char>
      <char org="Ù">uu</char>
      <char org="û">uu</char>
      <char org="Û">uu</char>
      <char org="ü">ue</char>
      <char org="Ü">ue</char>
      <char org="ÿ">yy</char>
      <char org="|">-</char>
      <char org="&lt;"></char>
      <char org="&gt;"></char>
      <char org=",">-</char>
      <char org="!"></char>
      <char org="(">-</char>
      <char org=")">-</char>
      <char org="«">-</char>
      <char org="»">-</char>
      <char org="‘">-</char>
      <char org="’">-</char>
      <char org="“">-</char>
      <char org="”">-</char>
      <char org="΄">-</char>
      <char org="'">-</char>
      <char org="´">-</char>
      <char org="`">-</char>
      <char org="¢">cent</char>
      <char org="©"></char>
      <char org="÷"></char>
      <char org="µ"></char>
      <char org="·"></char>
      <char org="¶"></char> 
      <char org="±"></char>
      <char org="€">euro</char>
      <char org="£">pound</char>
      <char org="®"></char>
      <char org="§"></char>
      <char org="™"></char>
      <char org="¥">yen</char>
      <char org="°">degree</char>
      <char org="&#160;"></char>
    </urlReplacing>

Hi Thomas

What IIS version are you using locally and what are you using on the server?

/Jan

Locally i have windows 8.1 with IIS 8 and the server is Windows 2012 R2 with IIS 8 also.

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