The article explains about the Evo Traceoptions compared to Junos

Traceoptions does not show anything if they have configured like Junos way.

Junos OS Evolved uses a new tracing infrastructure. 
For Junos OS Evolved, trace data from all applications on all nodes is collected on the Routing Engine. 
You use the show trace application application-name node node-name command to read and 
decode trace messages stored in the trace files. 
You can modify trace options for specific applications at the [edit system trace application] hierarchy level. 
However, a few applications still use the traceoptions statement.