I am running OMEdit on Fedora 15 (64bit), (compiled with latest svn source tree     r 12467).
OMEdit - OpenModelica Connection Editor Version: 1.8.1
(I built it with ./configure --prefix=/usr/local --with-lapack --with-qwt --with-omniORB=/usr  --without-paradiseo)

SYMPTOM:
All solvers work fine excepting "dassl" and "dassl2" for some reason. These two solvers always crash with the following debug info.
Here is the output simulating "SimpleIntegrator.mo" from Examples.

Can someone please let me know how I can track down the cause of this.

Here is the debug window output

Process crashed debug   | NO override given on the command line.
debug   | read all the DefaultExperiment values:
        | | startTime = 0
        | | stopTime = 1
        | | stepSize = 0.002
        | | tolerance = 0.001
        | | solver method: dassl
        | | output format: mat
        | | variable filter: .*
debug   | read xml file for states:
        | | Real x(start=2, fixed=false, {nominal=1}, min=-1.79769e+308, max=1.79769e+308)
debug   | read xml file for stateDerivatives:
        | | Real der(x)({start=0}, fixed=false, {nominal=1}, min=-1.79769e+308, max=1.79769e+308)
debug   | read xml file for real algebraic:
        | | Real u(start=1, fixed=false, {nominal=1}, min=-1.79769e+308, max=1.79769e+308)
debug   | read xml file for integer algebraic:
debug   | read xml file for boolean algebraic:
debug   | read xml file for string algebraic:
debug   | read xml file for real parameters:
debug   | read xml file for integer parameters:
debug   | read xml file for boolean parameters:
debug   | read xml file for string parameters:
Allocated simulation result data storage for method 'mat' and file='SimpleIntegrator_res.mat'
Recognized solver: dassl.
debug   | *** Initializing DASSL
debug   | Wrote parameters to the file after initialization (for output formats that support this)
debug   | Performed initial value calculation.
debug   | Start numerical solver from 0 to 1
debug   | Call Solver from 0.000000 to 0.002000
debug   | **Calling DDASRT from 0 to 0.002
debug   | **Start step 0 to 0.002