index reduction using matlab2014b

I am trying to reduce the index of my DAE problem using the function reduceDAEIndex in Matlab 2014b . I am constantly getting the following error.

    Error using mupadengine/feval (line 157)
MuPAD error: Error: The variables must be specified by univariate function calls. [daetools::checkInput]

Error in sym/reduceDAEIndex (line 98)
  A = feval(symengine, 'symobj::reduceDAEIndex', eqs, vars);

Error in symbolic (line 103)
     [DAEs,DAEvars]=reduceDAEIndex(eqs,vars)

Can anyone tell me what is the problem?

[Szar]

I have the same question. :(

[Walter Roberson]

Could you post some sample inputs so we can test?

Also, Szar, which MATLAB release are you using?