Unable to issue z/OSMF MVS and TSO commands from Zowe Explorer

Products

• Brightside

Issue/Introduction

Getting error IKJ55357I when issuing TSO or MVS commands from Zowe explorer:
Error: z/OSMF REST API Error:
Rest API failure with HTTP(S) status 500
reason: Failed to create console due to TSO/E CONSOLE command got an error. 
IKJ55357I THE VALUE SPECIFIED ON THE UNSOLNUM KEYWORD IS GREATER THAN THE MAXIMUM VALUE.+    
return-code: 5
reason-code: 7

Environment

Zowe Explorer
z/OSMF

Cause

User is not authorized to perform TSO or MVS commands from Zowe Explorer.

Resolution

The MVS console services is managed by RACF security.

Requirement to update UNSOLNUM temporarily:

The security team will need to make sure that user has the right "attributes" (e.g. SPECIAL, OPERATIONS, ...) specified in the user profile (`LU USERID`). 
Then user should be able to run the CONSPROF command and verify the values configured for the ID. 
To modify those values, run: `CONSPROF UNSOLNUM(####)`

Tip:
 
To validate that MVS Console commands will work via Zowe Explorer, perform the following Zowe CLI commands:

• zowe console issue cmd "d a"
• zowe tso issue cmd "time"

Additional Information

The configuration and permissions for these tools should be the same as the Zowe CLI's `zowe console issue command` and `zowe tso issue command`.

Here are some links that might be useful when configuring your MVS console services on z/OS.

• Customizing the CONSOLE and CONSPROF commands
• CONSPROF command
• Explanation for error message IKJ55357I.

Note: 
The documentation has a fallback value ("The maximum value of nnnnn") which could be used to avoid failures from the CONSPROF command. However, this default/fallback may also need to be configured.