Hello all. I am experiencing a frustrating issue when I try to check out a document for editing in one of our Sharepoint (running MOSS 2007, Office 2010, IE9, Win 7 x86), when I try to open the document, I receive the following message: 'Object reference not set to an instance of an object.' and when I click OK, 'This document could not be checked out. You may not have permission to check out the document or it is already checked out or locked for editing by another user.' The second error is superfluous because none of those conditions are true. I believe this to be a local machine issue and not related to the SP server install. Any ideas? Missing updates?Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

HI, I suggest you to capture more details about this issue by doing the same after enabling verbose mode of logging. Moreover please check whether a checked in version of the document exists or not. I hope this will help you out. Thanks, Rahul Rashu

What version of the Office 2010 client do you have? I've seen this happen with the 64 bit version. I ended up using the 32 bit version and it's fine.Laura Rogers, MCSE, MCTS SharePoint911: SharePoint Consulting Blog: http://www.sharepoint911.com/blogs/laura Twitter: WonderLaura Beginning SharePoint 2010: Building Business Solutions with SharePoint

What version of the Office 2010 client do you have? I've seen this happen with the 64 bit version. I ended up using the 32 bit version and it's fine.Laura Rogers, MCSE, MCTS SharePoint911: SharePoint Consulting Blog: http://www.sharepoint911.com/blogs/laura Twitter: WonderLaura Beginning SharePoint 2010: Building Business Solutions with SharePoint

No checked in versions exist for any of these documents. I receive the same error when I try to check out any item in this sites' libraries. How do you enable verbose logging?Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

No checked in versions exist for any of these documents. I receive the same error when I try to check out any item in this sites' libraries. How do you enable verbose logging?Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

Office 2010 32 bit. This 'broke' when I did a re-install of Win 7 via WDS. I assume it is some configuration oddity but can't pin it down.Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

Office 2010 32 bit. This 'broke' when I did a re-install of Win 7 via WDS. I assume it is some configuration oddity but can't pin it down.Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

Hi, Then I will suggest you to check in them and then try to check out them. You can enable versobe mode of logging by logging into central admin-->Operations-->diagonistic Logging. Alternatively you can use STSADM command as well.Refer this http://technet.microsoft.com/en-us/library/cc261740(office.12).aspx Hope this will help you out. Thanks, Rahul Rashu

Hi, Then I will suggest you to check in them and then try to check out them. You can enable versobe mode of logging by logging into central admin-->Operations-->diagonistic Logging. Alternatively you can use STSADM command as well.Refer this http://technet.microsoft.com/en-us/library/cc261740(office.12).aspx Hope this will help you out. Thanks, Rahul Rashu

Rashu, I just created a new document and when I tried to check it in received this error in Word: Cannot perform this operation. The file is no longer checked out or has been deleted. It will not let me check in.Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

Rashu, I just created a new document and when I tried to check it in received this error in Word: Cannot perform this operation. The file is no longer checked out or has been deleted. It will not let me check in.Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

I think this may be an error entry related to my issue from the logs: w3wp.exe (0x19D8) 0x3E68 CMS Publishing 8x0a High AppDomainUnloadListener.RegisterSelf() entered lock(this=64880701)Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

I think this may be an error entry related to my issue from the logs: w3wp.exe (0x19D8) 0x3E68 CMS Publishing 8x0a High AppDomainUnloadListener.RegisterSelf() entered lock(this=64880701)Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

Hi, Whether the document library you are using is OOB or you are using a customized one? If you are using a customized one then I would suggest you to use the OOB one and do let us knwo the results. Thanks, Rahul Rashu

Hi Gryphoenix, It seems to be the Alternate Access Mappings settings issue and you need to change the Internal URL to the Fully Qualified Domain Names (FQDN). There is a similar post discussing about the “Check Out”/”Check In” issues and you can check it, http://social.technet.microsoft.com/Forums/en-IE/sharepointgeneral/thread/505322bc-3987-422b-a26f-17a8ddedad77 And there is another article related to the issue of “Check Out” through the ISA Server, http://blogs.technet.com/b/isablog/archive/2008/10/02/unable-to-check-out-a-document-in-moss-2007-published-through-isa-server-2006.aspx Thanks & Regards, Daniel

Hm. Now it's working for me, randomly. I can't think of any recent changes. Go figure...Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

We are already using the FQDN across our org. Also, users with the exact sofware configuration as I have were able to check out the document. It's currently working correctly so I don't know what the actual problem was!Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

So, as randomly as it worked, it's not working again. Same errors as described above.Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

I captured the following using Fiddler. Any ideas?? --- HTTP/1.1 500 Internal Server Error Cache-Control: private Content-Length: 566 Content-Type: text/xml; charset=utf-8 Server: Microsoft-IIS/7.5 X-AspNet-Version: 2.0.50727 Persistent-Auth: true X-Powered-By: ASP.NET MicrosoftSharePointTeamServices: 12.0.0.6421 Date: Wed, 01 Jun 2011 16:36:00 GMT <?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><soap:Fault><faultcode>soap:Server</faultcode><faultstring>Exception of type 'Microsoft.SharePoint.SoapServer.SoapServerException' was thrown.</faultstring><detail><errorstring xmlns="http://schemas.microsoft.com/sharepoint/soap/">Object reference not set to an instance of an object.</errorstring></detail></soap:Fault></soap:Body></soap:Envelope> Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7

Wow. I was connecting via HTTP and not HTTPS. This is why I could not check out any documents. So, for anyone with this problem, see if connecting via HTTPS solves your problem.Thanks, God bless! Michael C. | Using CRM 4.0, Rollup 7