There's not much more info from Octopus logs :
| == Running: Step 40: SOAPUI Tests - clone (1) ==
|
| Running: ***** Web Server
11:23:35 Verbose | Octopus Server version: 3.13.6+Branch.master.Sha.f00cbbf5c6ace477cb8d9e1b458f1cf5c3b32cc6
11:23:35 Verbose | Environment Information:
| OperatingSystem: Microsoft Windows NT 6.2.9200.0
| OsBitVersion: x64
| Is64BitProcess: True
| CurrentUser: NT AUTHORITY\SYSTEM
| MachineName: [Octopus server]
| ProcessorCount: 4
| CurrentDirectory: C:\Windows\system32
| TempDirectory: C:\Windows\TEMP\
| HostProcessName: Octopus.Server
11:23:35 Info | Executing script on '***** Web Server'
11:23:36 Verbose | Octopus Deploy: Calamari version 3.7.65+Branch.master.Sha.8097779b7c3b6ad3a96e52107d4727c40e9b307e
11:23:36 Verbose | Environment Information:
11:23:36 Verbose | OperatingSystem: Microsoft Windows NT 6.1.7601 Service Pack 1
11:23:36 Verbose | OsBitVersion: x64
11:23:36 Verbose | Is64BitProcess: True
11:23:36 Verbose | CurrentUser: CORP\[Accont]
11:23:36 Verbose | MachineName: [machine name]
11:23:36 Verbose | ProcessorCount: 1
11:23:36 Verbose | CurrentDirectory: C:\Octopus\Work\20170602102336-303
11:23:36 Verbose | TempDirectory: C:\Users\ncbcdevwebservice\AppData\Local\Temp\
11:23:36 Verbose | HostProcessName: Calamari
11:23:37 Verbose | Executing 'C:\Octopus\Work\20170602102336-303\Script.ps1'
11:23:39 Verbose | Name Value
11:23:39 Verbose | ---- -----
11:23:39 Verbose | CLRVersion 2.0.50727.5485
11:23:39 Verbose | BuildVersion 6.1.7601.17514
11:23:39 Verbose | PSVersion 2.0
11:23:39 Verbose | WSManStackVersion 2.0
11:23:39 Verbose | PSCompatibleVersions {1.0, 2.0}
11:23:39 Verbose | SerializationVersion 1.1.0.1
11:23:39 Verbose | PSRemotingProtocolVersion 2.1
11:23:39 Verbose | PowerShell Environment Information:
11:23:39 Verbose | OperatingSystem: Microsoft Windows NT 6.1.7601 Service Pack 1
11:23:39 Verbose | OsBitVersion: x86
11:23:39 Verbose | CurrentDirectory: C:\Octopus\Work\20170602102336-303
11:23:39 Verbose | CurrentLocation: C:\Octopus\Work\20170602102336-303
11:23:39 Verbose | TempDirectory: C:\Users\ncbcdevwebservice\AppData\Local\Temp\
11:23:39 Verbose | HostProcessName: powershell
11:23:39 Verbose | TotalPhysicalMemory: 4193848 KB
11:23:39 Verbose | AvailablePhysicalMemory: 2503948 KB
11:23:39 Info | Removing any previous SOAPUI test results.
11:23:39 Info | SOAPUI Execution.
11:23:39 Info | del %TEMP%\jfxrtpath
11:23:39 Info | set CLASSPATH=%CLASSPATH%;%JFXRTPATH%
11:23:39 Info | rem JVM parameters, modify as appropriate
11:23:39 Info | set JAVA_OPTS=-Xms128m -Xmx1024m -Dsoapui.properties=soapui.properties "-Dsoapui.home=%SOAPUI_HOME%\"
11:23:39 Info | if "%SOAPUI_HOME%\" == "" goto START
11:23:39 Info | set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.ext.libraries="%SOAPUI_HOME%ext"
11:23:39 Info | set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.ext.listeners="%SOAPUI_HOME%listeners"
11:23:39 Info | set JAVA_OPTS=%JAVA_OPTS% -Dsoapui.ext.actions="%SOAPUI_HOME%actions"
11:23:39 Info | :START
11:23:39 Info | rem ********* run soapui testcase runner ***********
11:23:39 Info | More? SOAPUI Execution - Finished - Exit code : 255.
11:23:39 Verbose | Updating manifest with output variables
11:23:39 Verbose | Updating manifest with action evaluated variables
11:23:39 Error | No SOAPUI test results available.
Interestingly enough another user had the same issue as me.
https://community.smartbear.com/t5/SoapUI-Open-Source/Can-t-execute-script-by-using-testrunner-bat-via-a-webportal/m-p/143221#M24240