Hi all,

I am in the process of starting again with our umbraco site and porting all the content from the existing install to a new one. For ease, I will be using the same version in the new install so I have downloaded the source for version 4.5.1, compiled and ran it, followed the installer, copied over relevant files (master pages, css, media etc), and during the process of converting my XSLT to the new schema, I tried to save an editted XSLT file in the umbraco backend and got the error message below.

Error occured

System.IO.FileNotFoundException: Could not load file or assembly '......umbraco\presentation\bin\Umlaut.Umb.Blog.dll' or one of its dependencies. The system cannot find the file specified. 
File name: '......umbraco\presentation\bin\Umlaut.Umb.Blog.dll' 
at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) 
at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) 
at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) 
at System.Reflection.Assembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, StackCrawlMark& stackMark) 
at System.Reflection.Assembly.LoadFrom(String assemblyFile) 
at umbraco.macro.GetXsltExtensions() in .......umbraco\presentation\macro.cs:line 778 

=== Pre-bind state information === 
LOG: User = domain\user
LOG: Where-ref bind. Location =

.....umbraco\presentation\bin\Umlaut.Umb.Blog.dll 
LOG: Appbase = ....umbraco/presentation/ 
LOG: Initial PrivatePath = .......umbraco\presentation\bin 
Calling assembly : (Unknown). 
=== 
LOG: This bind starts in LoadFrom load context. 
WRN: Native image will not be probed in LoadFrom context. Native image will only be probed in default load context, like with Assembly.Load(). 
LOG: Using application configuration file: .......umbraco\presentation\web.config 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\machine.config. 
LOG: The same bind was seen before, and was failed with hr = 0x80070002. 

The changes made to the file were not saved. The missing dll file is not in the directory specified and doing a search for it yields nothing. Can anybody give me some advice?

Thanks in advance,
Max.