Getting message N96008 in my NMBCI batch job

Products

• CMDB for z/OS
• NetSpy Network Performance
• NetMaster Network Automation
• SOLVE
• NetMaster Network Management for SNA
• NetMaster Network Management for TCP/IP
• NetMaster File Transfer Management
• SOLVE:Operations Automation
• SOLVE:Access Session Management
• SOLVE:FTS
• SOLVE:Central Service Desk

Issue/Introduction

Why am I getting message N96008 in my NMBCI batch job?

Here's my JCL, which I've based on the NCL Guide appendix I: Batch Command Interface. 

//NMBCI EXEC PGM=NMBCI 
//SYSPRINT DD SYSOUT=* 
//SYSOUT DD SYSOUT=A 
//SYSIN DD * 
BCILOGON MAI USER NETMBSYS PASSWORD LUPREF NMM9F MENU BCI 
SHOW USERS 
BCIDISC 
/* 

The results are: 

+BCILOGON MAI 
=N96008 UNRECOGNISABLE DATA AT 'NMM9F ' 
+SHOW USERS 
=N96001 COMMAND IGNORED - NO SOLVE SESSION 
+BCIDISC 
=N96001 COMMAND IGNORED - NO SOLVE SESSION 

I've tried various combinations of LU with the whole LUNAME, MENU with the option BCI, a different LUPREF value (the LU1 variant instead of the full-screen one above), etc. but they all yield the same N96008 message. 

What am I doing wrong?

Environment

All NetMaster and SOLVE products, all releases

Resolution

The logon needs to be for that of the user submitting the job, not a background user.
Sample JCL that works:

//NMBCI EXEC PGM=NMBCI 
//STEPLIB DD DSN=<hlq>.SM50.LOAD,DISP=SHR 
//SYSPRINT DD SYSOUT=* 
//SYSOUT DD SYSOUT=A 
//SYSIN DD * 
BCILOGON SOLVE USER AAAAAAAAA PASSWORD QWERTY LUPREF NMF MENU BCI 
SHOW USERS 
BCIDISC 
/*