2542916 - The command 'disp+work' from tool 'disp+work' could not be executed successfully

• During the MOD_SELROADMAP/TOOLVERSXML_KERNELPARAMS_ROADMAP phase of the upgrade, the following error is encountered:

SAPupConsole.log:

Severe error(s) occurred in phase 
MOD_SELROADMAP/TOOLVERSXML_KERNELPARAMS_ROADMAP!
Last error code set:
Error: The command 'disp+work' from tool 'disp+work' could not be executed successfully

TOOLVERSXML_KERNELPARAMS_ROADMAP.LOG:

1ETQ399 Using a tool filter disp+work...
1ETQ399 Determining some tool versions from current path...
1ETQ399 Executing the command 'disp+work' for the 'non-ignorable' tool 'disp+work' in cur-path '(null)'
1ETQ399 Output of 'disp+work' to be found in 'disp+work_cur.out'
1EETQ399 Error: Non-ignorable executable 'disp+work' in dir '<current tool path>' does not exist - missing!
1EETQ399 Last error code set is: Error: The command 'disp+work' from tool 'disp+work' could not be executed
1EETQ399Xsuccessfully
1EETQ204 Upgrade phase "TOOLVERSXML_KERNELPARAMS_ROADMAP" aborted with severe errors ("20170918145505")

• Suggested solution in KBA 2231295 - SUM error: Cannot find executable 'disp+work' in path: PATH does not fix the issue.
• Kernel can be found in the directory "/usr/sap/<SID>/SYS/exe/run/".

• Windows
• SUM 1.0 SP21

disp+work, PATH, MOD_SELROADMAP, TOOLVERSXML_KERNELPARAMS_ROADMAP, SUM, tp, R3trans, R3load , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem