Set Breakpoint in IB-Matlab Call Back Function

Hi,

If I set a breakpoint in an IB-Matlab callback function it trashes the stack and crashes Matlab.

function IBCallbackContractDetails(ibConnector, eventData)
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
end

optionChain = IBMatlab('action', 'query', 'SYMBOL', 'SPX', 'secType', 'OPT', ...
'exchange', 'CBOE', 'currency', 'USD', ...
'expiry', '201506', 'right', '', 'strike', 0.0, ...
'CallbackContractDetails', @IBCallbackContractDetails)

Any ideas on why?

[Geoff Hayes]

David - so you have set a breakpoint in the IBCallbackContractDetails function? How often does this callback fire?