Cannot get active document when user clicks the document in Adobe FM 2015.

i facing following problem:

 

i have timer in application hits repeatedly after 2 seconds active document name (if there any).

 

if user selects text (on mouse click down) of active document adobe fm 2015 following api call returns 0 (which wrong):

 

f_apigetid(fv_sessionid, fv_sessionid, fp_activedoc)

 

later, if user leaves mouse button (mouse click up) in next hit of timer document name fetched.

 

it seems adobe fm 2015 cannot handle simultaneously both user input application , api calls application.

 

why happening?

it seems adobe framemaker 2015 cannot handle @ same time user ui events , fdk api calls external applications.

 

when user interacts fm application fdk api calls of external application fail error codes.

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