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

[sebastian_dedin]

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.

[wolfgangziegler]

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.

[sebastian_dedin]

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.

[wolfgangziegler]

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

[sebastian_dedin]

They exist and work

Didn't work, getting the same output

[wolfgangziegler]

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

[sebastian_dedin]

There are some exe calling oneagentproc_27632.dll

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

[wolfgangziegler]

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

[sebastian_dedin]

Yes it is

[wolfgangziegler]

Are any other Dynatrace DLLs loaded into this process?

[sebastian_dedin]

No there are not

[wolfgangziegler]

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?

[sebastian_dedin]

Hi

this are the dynatrace dlls loaded by sample1.exe

oneagentproc version:1.195.146.90

[wolfgangziegler · Accepted solution]

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.