topic Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++ in Open Q&A

Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Fri, 03 Jul 2020 09:00:54 GMT

Getting the Error: Could not load agent module for Dynatrace OneAgent SDK for C/C++: the specified module was not found

when trying to run the sample1.exe (OneAgent SDK for C/C++) on windows.

OneAgent is running and I can't find out what the problem is.

Thanks for the help in advance.

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Fri, 03 Jul 2020 09:44:59 GMT

Hi,

did you follow the recommended troubleshooting steps?

https://github.com/Dynatrace/OneAgent-SDK-for-c#troubleshooting

Please provide the console output for more information.

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Mon, 06 Jul 2020 07:36:35 GMT

Yes

2020-07-06 07:13:06.184 UTC [00000620] info [onesdk] Initializing Dynatrace OneAgent SDK for C/C++ ...

2020-07-06 07:13:06.200 UTC [00000620] info [onesdk] SDK stub version 1.5.1.4, build date 2019.10.23 12:58:09.

2020-07-06 07:13:06.209 UTC [00000620] fine [onesdk] Preparing arguments...

2020-07-06 07:13:06.213 UTC [00000620] config [onesdk] Options:

2020-07-06 07:13:06.218 UTC [00000620] config [onesdk] Agent active: true

2020-07-06 07:13:06.222 UTC [00000620] config [onesdk] Agent module: 'oneagentloader.dll'

2020-07-06 07:13:06.226 UTC [00000620] config [onesdk] SDK log level: finest

2020-07-06 07:13:06.230 UTC [00000620] config [onesdk] Additional options:

2020-07-06 07:13:06.235 UTC [00000620] config [onesdk] ONESDK_INTERNAL_CA627667445C40F0_INIT_FLAGS=0

2020-07-06 07:13:06.240 UTC [00000620] fine [onesdk] Loading agent module...

2020-07-06 07:13:06.280 UTC [00000620] info [onesdk] Could not load agent module for Dynatrace OneAgent SDK for C/C++: The specified module was not found

ONESDK initialized: no initialize: The specified module was not found

agent_set_warning_callback: Not initialized.

agent_set_verbose_callback: Not initialized.

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Tue, 07 Jul 2020 05:44:27 GMT

Hi,

I cannot see any suspicious in these log lines. Here are a couple of ideas and questions:

The log message looks like OneAgent was not installed. Could you verify that the installation works:
- oneagentproc.dll must be loaded into the process (this can be verified with Process Explorer)
- oneagentloader.dll and oneagentsdk.dll must exist on your machine.
A reboot after OneAgent installation might be required
Is the application running with a debugger attached (from within Visual Studio)?
- If yes, please try running it as a Release build outside Visual Studio

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Tue, 07 Jul 2020 07:07:02 GMT

They exist and work

Didn't work, getting the same output

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Tue, 07 Jul 2020 07:08:51 GMT

Do you see oneagentproc.dll being loaded into the process?

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Mon, 13 Jul 2020 13:27:48 GMT

There are some exe calling oneagentproc_27632.dll

but not the Dynatrace-OneAgent-Windows-1.193.170.exe

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Tue, 14 Jul 2020 05:33:06 GMT

The application using the C++ SDK must have oneagentproc.dll loaded at runtime. Can you verify that please?

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Tue, 14 Jul 2020 09:55:50 GMT

Yes it is

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Tue, 14 Jul 2020 11:31:31 GMT

Are any other Dynatrace DLLs loaded into this process?

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Tue, 14 Jul 2020 19:41:23 GMT

No there are not

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Thu, 16 Jul 2020 07:47:27 GMT

Hi,
could please attach a screenshot of process explorer where we see the list of loaded DLLs - sorted by "Company Name" (so we see everything by Dynatrace) and displaying the DLL version information?

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

sebastian_dedin — Fri, 17 Jul 2020 05:32:20 GMT

this are the dynatrace dlls loaded by sample1.exe

oneagentproc version:1.195.146.90

Re: Could not load agent module for Dynatrace OneAgent SDK for C/C++

wolfgangziegler — Fri, 17 Jul 2020 07:06:21 GMT

Thanks,

that was really helpful!

A potential problem could be this "Digital Guardian Agent" that is also present in the process. Multiple agent technologies within a process has caused similar issues in the past. I suggest disabling this other agent (if possible) and see if the problem persists. In any case, you might want to open a support case with us so we can collect logs and additional data about the possible conflict between those agent technologies.