# Integration function - dynare v4?

**URL:** <https://forum.dynare.org/t/integration-function-dynare-v4/1169>\
**Category:** Dynare help (legacy posts)\
**Created:** [15 September 2009 09:48 UTC](https://forum.dynare.org/t/integration-function-dynare-v4/1169 "2009-09-15T09:48:19Z")\
**Posts on this page:** 1\
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**Author:** ![cel](https://forum.dynare.org/letter_avatar_proxy/v4/letter/c/35a633/32.png) [@cel](https://forum.dynare.org/u/cel)\
**Post date:** [15 September 2009 09:48 UTC](https://forum.dynare.org/t/integration-function-dynare-v4/1169/1 "2009-09-15T09:48:19Z")

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Hi everyone,

Is it possible to use the matlab function ‘quad’ (which evaluates integral) with Dynare 4?  
ps : please, find in the attached file the .mod program, it runs with dynare 3 and not dynare 4, the error message is:  
UnknownFunctionNode::eval: operation impossible!  
error: the variable or parameter (Hauc) has not been initialized (in derivatives evaluation)  
(…)  
ERROR: WelfACT.mod:141.22-25: syntax error, unexpected NAME, expecting INT\_NUMBER or MINUS or PLUS

Thanks!  
Céline  
[test.zip](https://forum.dynare.org/uploads/default/original/1X/1c4f4f37ae3b96bb0562318e12acafe1c63f2da6.zip) (2.16 KB)

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