We have recently found that the client-side portion of the hotfix is already included in UR3, but some of the DLLs were further changed with UR3.
This can lead to a situation where installing the client-side hotfix after UR3 will load an older version of three DLL files (DesktopMFC.dll, EssentialsDB.dll, RevitDB.dll), and the other changes in UR3 were not meant to work with those older DLLs. This is where we see the error above when launching Revit.
To clear the issue, restore the DLL files by renaming the 391388 appended version (e.g. DesktopMFC.391388.dll) back to the original file name or replace the DLL with the ones below:
If you have the Autodesk Application Manager installed hopefully you have seen these two updates.
Revit 2015 Update Release 1 was released previously.
Revit 2015 Update Release 2 is referred to as the Security Update. This security update includes all Update Release 1 improvements. Additionally it addresses Heartbleed vulnerability (a security bug in the open-source OpenSSL cryptography library).
Revit 2015 introduces some new revision tool functionality. I’ve outlined the 3 biggest changes from 2014, along with some additional information:
Instead of a generic cloud tool that required a lot of clicks, the standard draw tools are now available. Rectangle is set as the default for revision cloud sketches:
Revisions can now be deleted, which will remove the revision from the project and all associated clouds \ tags. You cannot delete an issued revision:
On a project-wide basis you can control the maximum cloud segment size (the “double bubble”). For example, if Arc Length is set to 2”, and you are drawing a revision cloud on a sheet directly, after the segment passes 2” a second segment would begin:
Some quick additional tidbits to keep in mind:
With Revit 2015 revision clouds are treated similar to annotation and scale according to the view scale. For example, if you were to draw the clouds directly on a sheet the exact arc length value would utilized.
Revit has always used a special “double bubble” cloud segment. The Arc Length value refers to the maximum allowed sheet space size per double arc segment (see above Arc Length image).
Upgrade Arc Length
By default the Arc Length is set to 3/4” for new 2015 projects. If your previous-release project contains revision clouds, when you upgrade to Revit 2015 the Arc Length is set to 3 1/2”. For most cases this will prevent revision cloud geometry changes on upgrade. Then, on a project basis, you can set it to the desired size.
You can always create segments smaller than the specified Arc Length.
With each development cycle the Revit team works to develop new features, enhance or expand existing functionality, and improve the overall performance of Revit. The 2015 development cycle was no different in this respect and overall performance of Revit 2015 has increased when tested against Revit 2014.
Of particular note is the performance of graphics related operations. In our tests we saw the greatest improvements in raster image operations (move, cop, array, etc…), view navigation, and element selection.
This year’s Revit development also included a project that alters the internal family data structure which optimizes some computation heavy update operations that are triggered when the model is changed. In some cases we have seen performance in these areas improved up to 30%.
Because of the calculation intensive nature of Revit MEP, separate performance statistics are kept for MEP functions and MEP heavy project files. The performance increases for MEP were found to be similar. MEP specific performance tests also showed increase in performance in most areas from 2014 to 2015.
You can of course test and rate the performance of Revit on your hardware and using your projects to see if you get similar results as our tests. Revit Forum has its own bench mark test. You can find more information on how to run your own test in this thread.