Extension 2050.xml

<extension name="2050">
  <condition field="destination_number" expression="XXXXXXX">
    <action application="set" data="call_timeout=10"/>
    <action application="set" data="hangup_after_bridge=true"/>
    <action application="set" data="continue_on_fail=true"/>
    <action application="bridge" data="sofia/internal/2050%<server ip>"/>
    <action application="answer"/>
    <action application="export" data="voicemail_alternate_greet_id=XXXXXXXXX"/>
    <action application="sleep" data="1000"/>
    <action application="voicemail" data="default $${domain} 2050"/>
    <action application="lua" data="/etc/freeswitch/dialplan/public/vm.lua cody.rosenbloom@gmail.com 2023345612 2050"/> <!--> does nothing at all <-->
    <action application="log" data="just checking that this is reached"/>    <!--> This is logged successfully <-->
  </condition>
</extension>

vm.lua

local eml = argv[1];
local caller = argv[2];
local folder = argv[3];
print("hello World");
if(eml ~= '') then
	os.execute(string.format("/home/danieln/checkVoicemails2 %s %s %s",extfolder,caller,eml)); --
end

checkVoicemails2 works perfectly when tested independently hence not pasting