Hi, is there a way of recording midi from FL Studio as a VSTi in Sonar?  I've added it to the instrument track - gone into FL Studio and set up a drums loop.  I then come back into Sonar - if I press play the loop created in FL Studio plays normally.  However, is there a way to record it into midi in the track in Sonar?

I think you need to set FL up as a Rewire thingy.

FL recommended to me not using rewire because of all the crashes

Have you checked all drivers are up to date? Or perhaps some setting in Sonar or FL is wrong? Just doing guess work.

Thanks all.  Drivers are all fine.  Definitely must be a setting in either FLStudio or Sonar - just can't work out what that setting is!

I have never tried to do anything like that, so am grasping - does making sure the Enable Midi Output setting in the Insert Soft Synth dialog box help?  
 
Also, while others may have a more elegant solution, couldn't you save the midi data - export it - from within FL Studio, to a file somewhere, and then import the midi file into a track in Sonar?
 
I work with midi tracks all the time, as a keyboard player, but I always am simply working directly with midi tracks and audio tracks in Sonar - sorry I don't know more about doing what you are attempting.
 
Yet another chance for me to learn something from folks in the forum,
 
Bob Bone

Don't use the rewire as its way to glitchy in sonar,the best way is within sonar select the channels fl studio is loaded into you want to record and "Bounce to tracks" works like a dream.also i recomend within sonar start your tracks one bar ahead,as in start on bar 2,because fl studio tends to miss notes on the first beat but syncs perfectly after that.
   this is also recommended from the fl studio manual when using it as vsti. 

to record midi you have to tell flstudio which midi channels to send to,and when loading fl studio into sonar you need sonar set to receive midi.this can be done within the channel settings in fl studio,you also may need to change a setting within fl studio preferences

Thanks all for your help so far.  I've still not managed to work it out yet!  I've been tried just recording an audio clip from FLStudio VSTi but can't do that either?  When I click play - in Sonar - I can hear FLStudio but I can't seem to record what is being played.  Anyone?!

Can't help with recording midi from Fl into Sonar, but to answer your latest question, I do know how to record audio: In Sonar, select the region of the FL track you want, click on Tracks, Bounce to Tracks to get the Bounce to Tracks dialog box, then select Tracks in the Source Category, and FL Studio VSTi in the Source Tracks box. By default, this bounces the audio that is playing through the Audio track down to another track
 
This process is quick, and you still have access to the midi inside FL - if you want to make changes, just delete your bounced audio, and repeat the bounce process once you've made any changes inside FL.
 
By the way, I always save the flp file from within FL to make sure I still have that in case something happens to the Sonar file
 
Hope this help