string concatenation

[OldEagle]

why I cannot use string concatenation here?


parse error: expected ')'
       saw: operator '.' at trace-rfs-file.stp:8:32
    source: probe module(@1).function("*@" . "/root/trunk/client/src/thread.c").call
                                           ^
1 parse error(s).


Regards,
Zhiwei