Invalid sip URI errors while calling to PSTN via freepbx


I am trying to make first time outbound calls using freePBX. I have configured the SIP trunks , routes, and extension. Now when I am trying to make first call then “invalid sip PRI” error is happening. Can anybody help???

Please supply complete information. I am assuming in says SIP URI but where is that error occurring? We need version information for Asterisk and FreePBX, OS etc. (If distro which one and version).

Also Asterisk log at the time of the error is very useful. If long log use and leave a link in the forum message.

The problem was with number formats. After rectifications freepbx working fine for outbound calls.