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Felix Gruber authored
When MPI is not found, UG_ENABLE_PARALLEL is not defined in CMakeLists.txt and thus, the preprocessor variable ModelP is not defined. This in turn means that the message_buffer and message_buffer_size member variables will not be defined which leads to compilation errors in the accessor methods that use these member variables. To prevent these compilation errors when not using MPI, I moved the accessor methods into #ifdef ModelP blocks.
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