Here are a few remarks based on my initial use of MASON. 0. I installed MASON, it works, I wrote some extensions (elaborated some cellular automata examples based on tutorial1and2). But when I imported it to Eclipse using the instructions in https://cs.gmu.edu/~eclab/projects/mason/extensions/eclipse/, I got tons of error messages. The console still appeared, but the example simulations, like ants, did not run, due to many errors. I guess Eclipse tried to recompile and did not succeed; could it be a conflict with my other installation (in a different folder)? 1. Manual page 15: when buddies.clear() is first written in the example program, the class containing buddies has not been imported yet. 2. Manual page 19: When the running time is limited in the example run, not the -time option but the -until option is needed. 3. Correction to the mason.command: when creating the new CLASSPATH, the ORIGINAL_CLASSPATH should be put into quotes, otherwise when it contains a * with a meaning ``all jar files'', it will expanded and this will lead to a no match error in tcsh. 4. Correction to the TableLoader class: in the implementations of the flipY option there is a one-off error: Example: for(int j = 0; j < height/2; j++) { int temp = vals[i][j]; vals[i][j] = vals[i][height-j-1]; // was + 1 vals[i][height-j-1] = temp; // was + 1 }