Question or Problem
You installed ECTR 5.2.3.0 on a "clean" windows PC and get this error during first start:
JCo initialization failed with java.lang.UnsatisfiedLinkError: C:\Program Files (x86)\SAP\ECTR\basis\sys\win\lib64\sapjco3.dll: Can't find dependent libraries
DE: 
EN: 
Causes or Possible Causes
With ECTR 5.2.3.0 JCo has been changed from 3.0.19 to 3.1.2. There is a new requirement now which not yet covered by installer.
Solution
On Windows platforms, JCo 3.1 requires the Visual Studio 2013 C/C++ runtime libraries to be installed on the system. If not present, download and install the "Visual C++ 2013 Redistributable Package" from the Microsoft knowledge base article https://support.microsoft.com/en-us/help/4032938 and choose the package, which corresponds to the used Locale and JVM bit-width (x64 for 64-bit or x86 for 32-bit).
See Also
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