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The projected SIS-100 synchrotron at GSI will be used for operation with intense proton and heavy ion beams. In order to avoid the crossing of the transition energy during proton operation a complicated optics scheme is proposed to provide a transition energy above the extraction energy of E=29 GeV. For the purpose of optimizing the lattice, and to find a suitable working point, regime simulation scans of the dynamic aperture are performed based on MAD-X tracking. In the next step working point candidates will be used for particle tracking simulations in order to estimate beam loss due to space charge induced resonance crossing. For these studies different codes and space charge models are considered.
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