Good day,

I have a win server with 2 sites running through IIS, prod and test. We upgraded our license from a 2016 version to the latest version. I made the changes and pushed them to the test site and they worked flawlessly, the moment I push them to prod it gives me an error:

Server Error in '/' Application.

Failed to start image manager. Please see https://www.essentialobjects.com/doc/common/child_process_error.html for more details.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Exception: Failed to start image manager. Please see https://www.essentialobjects.com/doc/common/child_process_error.html for more details.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:

[Exception: Failed to start image manager. Please see https://www.essentialobjects.com/doc/common/child_process_error.html for more details.]
EO.Internal.rbat.qmve() +617
EO.Internal.rbat.qmvn() +315
EO. Internal.fryl.ihks(Action ntf) +54
EO.Internal.fryb.bpfp(Boolean& nmn, Type[] nmo, String nmp, String nmq) +384
EO.Internal.fryb.marc(Type[] nmk, String nml, String nmm) +71
EO.Internal.mwhi.fqsd() +2534
EO.Internal.frtr.ihks(Action luu) +59
EO.WebEngine.Engine.Start(WindowsIdentity user) +265
EO.Internal.dptw.hkpn() +556
[HtmlToPdfException: Failed to start image manager. Please see https://www.essentialobjects.com/doc/common/child_process_error.html for more details.]
EO.Pdf.Mvc.douj. 1gwh(HtmlToPdfOptions ao) +1884
EO.Pdf.Mvc.douh.mrlc(douh aa, Action ab) +83
System.Web.HttpWriter.FilterIntegrated(Boolean finalFiltering, IIS7WorkerRequest wr) +783
System.Web.HttpResponse.FilterOutput() +124
System.Web.CallFilterExecutionStep.System.Web.HttpApplication. IExecutionStep. Execute() +61
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +220
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +94

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4718.0


I have followed the link and made sure the sample app runs on the server. Seeing as the test site works i figured the rundll32.exe was not getting blocked. I have tried copying all the code directly from the test site into the prod site as well as deleting the test site completely but that didn't work.

Please help

Good day,

So something very odd has happened. I tried to replicate the error and get the logs over the last few days but the PDF's have just decided to work now. I haven't changed anything beside adding the logging to the already existing try catch. If they fail again I'll get the logs and send them through.

Thanks for fixing? XD