X_TRACE_LEVEL is a [fixed lexicon] with the following values:\\

%%zebra-table
||Saved\\Value||Displayed Value
| 0 | 0-Exceptions only
| 1 | 1-User Trace
| 2 | 2-Internal Level 2
| 3 | 3-Internal Level 3
| 4 | 4-Internal Level 4
| 5 | 5-Legislation
| 6 | 6-Internal Level 6
| 7 | 7-UserCalc Trace
| 8 | 8-Program Trace
| 9 | 9-Utility Trace
%%