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Check software installation status

Navigate to HMI → Commissioning → System data → Software options and verify that stock removal/simulation packages are properly installed and licensed.

Look for option bits related to simulation and stock removal in the software configuration

Verify DLL file presence

Access the Windows system through service mode and check the SINUMERIK installation directory (typically C:\Siemens\SINUMERIK) for stock removal related DLL files.

Only access Windows system files if authorized and familiar with the directory structure

Reinstall software components

Use SINUMERIK Operate software management to reinstall or repair the stock removal software package through the software update function.

Keep a backup of current machine data before performing software operations

Check stock removal machine data

Navigate to HMI → Commissioning → Machine data and search for parameters starting with $MC_STOCK_REMOVAL or similar stock removal related settings.

Use the machine data search function to quickly locate stock removal parameters

Verify simulation settings

Check machine data $MN_SIMULATION_MODE and related parameters to ensure proper configuration for stock removal functionality.

Document original parameter values before making changes

Reset to default values

If parameters appear corrupted, reset stock removal related machine data to factory defaults and reconfigure according to machine specifications.

Consult the machine manufacturer's parameter list for correct stock removal settings

Access Windows registry

Enter Windows service mode and run regedit to check HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\SINUMERIK for stock removal DLL registry entries.

Registry modifications can damage the system - create a backup before making changes

Verify system PATH variables

Check Windows environment variables to ensure SINUMERIK directories are properly included in the system PATH for DLL loading.

The PATH should include the main SINUMERIK installation and bin directories

Re-register DLL files

Use Windows command prompt to re-register the stock removal DLL using regsvr32 command with the appropriate DLL file path.

Run command prompt as administrator for proper DLL registration

Check file permissions

Verify that the SINUMERIK service account has read and execute permissions for the stock removal DLL files and directories.

Modifying system permissions requires administrator access

Review Windows security policies

Check Windows local security policies and antivirus settings that might be blocking DLL loading or execution.

Temporarily disable antivirus to test if it's blocking DLL access

Run SINUMERIK services with elevated privileges

Ensure SINUMERIK services are running with appropriate system privileges to access all required DLL files.

Check Services.msc for SINUMERIK service account settings

Verify software licensing

Check HMI → Commissioning → System data → Licenses to confirm that stock removal/simulation features are properly licensed.

Look for PowerLine or simulation-related license entries

Check hardware compatibility

Verify that the current PCU hardware supports stock removal functionality according to Siemens compatibility matrices.

Some older PCU versions may not support advanced simulation features

Update license file

If licensing is the issue, contact Siemens to obtain proper license keys for stock removal functionality and install them through the license management system.

Keep license certificates and documentation for future reference