But The Dllregister Entry Point Was Not Found
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Sometimes the module was loaded but the entry-point DLLRegisterserver was not found error can occur when the DLL file gets corrupted. Under this situation, you can try reinstalling the related program that includes the corrupted DLL file.
Regsvr32.exe was unable to find the required entry point in the module specified in the command line. This can occur if the entry points are not exported correctly from the module or if the module is not a .DLL or .OCX file.
Hi Everyone,I'm having an issue with a 2012r2 server I've inherited. It started when I was trying to figure out a problem with VSS which didn't allow to take a backup. One of the suggestions was to unregister and re-register some dlls, however, now I can't re-register some of them.I get the following error messages - which are different for different DLLs.es.dllvssapi.dllThe module "xxxxx.dll" was loaded but the entry-point DllRegisterServer was not found.Make sure that "xxxxx.dll" is a valid DLL or OCX file and then try again.eventcls.dllVssui.dllswprv.dllThe module "xxxxx.dll" was loaded but the call to DllRegisterServer failed with error code 0x80070715.For more information about this problem, search online using the error code as a search term.This obviously stops VSS from working. When I try to do a vssadmin resize for example I get an error in the Event Viewer:Volume Shadow Copy Service error: Unexpected error calling routine GetProviderMgmInterface. hr = 0x80042304, The volume shadow copy provider is not register in the system.I've done quite a bit of searching but haven't found anything that I can use.I've done chkdsk with no issues and a sfc /scannow returned that "sfc windows resource protection found corrupt files but was unable to fix some of them". I tried sfc /scannow in safe mode with the same result.Any help would be greatly appreciated!Theo
Regsvr32 will give this error if you attempt to load a file that cannot be registered with Regsvr32. It says that in the message, the "no entry point" part means that the DLL is not designed to be registered. So this error is normal.
An optional entry point into a dynamic-link library (DLL). When the system starts or terminates a process or thread, it calls the entry-point function for each loaded DLL using the first thread of the process. The system also calls the entry-point function for a DLL when it is loaded or unloaded using the LoadLibrary and FreeLibrary functions.
There are significant limits on what you can safely do in a DLL entry point. See General Best Practices for specific Windows APIs that are unsafe to call in DllMain. If you need anything but the simplest initialization then do that in an initialization function for the DLL. You can require applications to call the initialization function after DllMain has run and before they call any other functions in the DLL.
When the system calls the DllMain function with the DLL_PROCESS_ATTACH value, the function returns TRUE if it succeeds or FALSE if initialization fails. If the return value is FALSE when DllMain is called because the process uses the LoadLibrary function, LoadLibrary returns NULL. (The system immediately calls your entry-point function with DLL_PROCESS_DETACH and unloads the DLL.) If the return value is FALSE when DllMain is called during process initialization, the process terminates with an error. To get extended error information, call GetLastError.
During initial process startup or after a call to LoadLibrary, the system scans the list of loaded DLLs for the process. For each DLL that has not already been called with the DLL_PROCESS_ATTACH value, the system calls the DLL's entry-point function. This call is made in the context of the thread that caused the process address space to change, such as the primary thread of the process or the thread that called LoadLibrary. Access to the entry point is serialized by the system on a process-wide basis. Threads in DllMain hold the loader lock so no additional DLLs can be dynamically loaded or initialized.
If the DLL's entry-point function returns FALSE following a DLL_PROCESS_ATTACH notification, it receives a DLL_PROCESS_DETACH notification and the DLL is unloaded immediately. However, if the DLL_PROCESS_ATTACH code throws an exception, the entry-point function will not receive the DLL_PROCESS_DETACH notification.
When a DLL is unloaded from a process as a result of an unsuccessful load of the DLL, termination of the process, or a call to FreeLibrary, the system does not call the DLL's entry-point function with the DLL_THREAD_DETACH value for the individual threads of the process. The DLL is only sent a DLL_PROCESS_DETACH notification. DLLs can take this opportunity to clean up all resources for all threads known to the DLL.
The entry-point function should perform only simple initialization or termination tasks. It must not call the LoadLibrary or LoadLibraryEx function (or a function that calls these functions), because this may create dependency loops in the DLL load order. This can result in a DLL being used before the system has executed its initialization code. Similarly, the entry-point function must not call the FreeLibrary function (or a function that calls FreeLibrary) during process termination, because this can result in a DLL being used after the system has executed its termination code.
Because Kernel32.dll is guaranteed to be loaded in the process address space when the entry-point function is called, calling functions in Kernel32.dll does not result in the DLL being used before its initialization code has been executed. Therefore, the entry-point function can call functions in Kernel32.dll that do not load other DLLs. For example, DllMain can create synchronization objects such as critical sections and mutexes, and use TLS. Unfortunately, there is not a comprehensive list of safe functions in Kernel32.dll.
If your DLL is linked with the C run-time library (CRT), the entry point provided by the CRT calls the constructors and destructors for global and static C++ objects. Therefore, these restrictions for DllMain also apply to constructors and destructors and any code that is called from them. 2b1af7f3a8