This is syntax of GRLoader:
C:\temp>grloader -help
09:30:47.084 CI and Relationship Loader for CA Service Desk Manager R17.0
Invalid option (-help ) or missing argument
Usage:
Required:
-u *** - Userid for logon
-p *** - Password for logon
-s *** - Server URL including port (I.E. http://localhost:8080
Optional:
-cfg *** - configuration file. enter grloader -hc for details
-i *** - Input XML file
-e *** - Error XML file (defaults to inputname_err.xml)
-N *** - Path to nx.env, used when running JVM only
-v - Show GRLoader version
-h - This help
-hc - configuration file help
Processing Options
-a - Allow updates to Configuration Items
-n - Allow new CIs to be created
-maxerror n - set maximum number of errors
-maxwarn n - set maximum number of warnings
-maxci n - maximum number of CIs to process
-maxrel n - maximum number of relationships to process
-cor - change order required
-iia - ignore invalid attributes
-addjar *** - adds specified jar to grloader classpath
-aer yes/no - allow embedded relationships (yes)
-P - Preload data - improves performance for large processing
-slump - use slump protocol (may require addditional configuration)
-tf *** - file name to be used to translate values of attributes
-D *** - Name prefix for relations (defaults to "GRLoader")
-I - Ignore case of lookup attributes
-E - Allow overwriting of output XML files
-ad ***=*** - Set attribute default value
-ua - Update always. Disables identical data optimization
Output Options
-T *** - Trace Level
-C - Check input XML only
-simci - simulate ci operations only
-simrel - simulate relationship operations only
-nospinner - Don't show spinner
-sc *** - show class attributes for specified class
-scx *** - generate xml for the specified class
TWA Options
-lftwa - use transaction work area(twa) instead of xml input file
-lttwa - write input file to twa
-chg *** - only process twa transactions for this change reference number
-lttwar - load transactions into the ready state
-lftwai - inactivate successful transactions
Spreadsheet Input Options
-ssf *** - filename of excel spreadsheet
-sss *** - name of sheet within excel spreadsheet
-ssfr n - first row of the spreadsheet to be imported
-sslr n - last row of the spreadsheet to be imported
-ssfc n - first col number or letter of the spreadsheet to be imported
-sslc n - last col number or letter of the spreadsheet to be imported
-sses x - separator character for multiple embedded relationships
CSV Input Options
-csvf *** - csv file name
-csvsep x - csv field separator (,)
-csvesc x - csv field escape character (\)
-csvquote x - csv quote character (")
-csvcom x - csv comment character (#)
Database Input Options
-dbdriver *** - java class name for the database driver of the input database
-dbuser *** - database username of the input database
-dbpswd *** - database password
-dbstmt *** - database select statement
-dburl *** - url used to locate the database
Replace Symbolic Options
-rs - enable symbolic replacement in the input data
*now* unique timestamp
*userid* signed on user
*inputfile* name of input file
*cicount* current ci count
*relationcount* current relationship count
09:30:47.168 GRLoader ended
you can see if it is not that easy to follow here and maybe the doc helps a bit
Using GRLoader - CA Service Management - 17.1 - CA Technologies Documentation