Restriction in naming a signal

[KHOA NGUYEN]

Hello,
 
I have a problem when I name the signal with a string containing some characters like "_" or "-". For example:
 
msg = dbus_message_new_signal ("/com/enterp/dep", "com.enter.dep", "ab_cd");
 
The signal named "ab_cd" is rejected by this error:
 
process 8380: arguments to dbus_message_new_signal() were incorrect, assertion "_dbus_check_is_valid_member (name)" failed in file dbus-message.c line 1163.This is normally a bug in some application using the D-Bus library.
But I need absolutely these special characters "-", "_", ...in naming the signals for my application.
 
Do you have an idea about an solution for this ?
Thank you and bests regards
 
Vydaman

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