Error using GotoIf in a dialplan - asterisk

Question

I am trying to implement a complex dialplan that requires interaction with the user. Based on this interaction, the dialplan jumps to another part. Some sample code is given below:
[test]
;This is a test.
exten => 0,n(qa1),NoOp()
exten => 0,1,Verbose(1, "This is a test")
exten => 0,n,Set(USER_ANSWER=0)
exten => 0,n,Read(USER_ANSWER,,1,,2,10)
exten => 0,n,Verbose(1, "User keyed in ${USER_ANSWER}")
exten => 0,n,GotoIf($[$["${USER_ANSWER}"="1"] | $["${USER_ANSWER}"="2"]]?eval1:qa1)
exten => 0,n,Verbose(1, "User keyed in ${USER_ANSWER}")
exten => 0,n(eval),NoOp()
...
On running the above code, asterisk hangs up after evaluating the GotoIf condition above. The error messages are as follows:
-- User entered '1'
-- Executing [0#test:19] Verbose("DAHDI/13-1", "1, "User keyed in 1"") in new stack
"User keyed in 1"
-- Executing [0#test:20] GotoIf("DAHDI/13-1", "1?eval1:qa1") in new stack
-- Goto (test,0,21)
-- Executing [0#test:21] NoOp("DAHDI/13-1", "") in new stack
[Jan 25 10:47:48] WARNING[29738]: pbx.c:3677 pbx_extension_helper: No application 'If' for extension (test, 0, 22)
My questions are:
What does that error message mean?
How can I correct it so it works?

Answer 1

The GotoIf is invoked correctly. The label eval1 has If statements following it. Asterisk does not have If statements. Replacing the If statements with ExecIf did the trick. One can figure out what commands are available by typing, at the Asterisk CLI prompt, the following command:
core show application <command name here>
If the above command returns an output, then that command is available, else not.