You can use the dataSaveCSV function for looking in the dataset. It's available in version 1.66 that you can download from this forum. Alternatively, print the selected contract or the whole chain with contractPrint().

The most common problem for generating artificial contracts is some R or RQuantlib installation problem. You see R error messages only on the R console, so the first thing to check is if RQuantlib is working. Call a function from it, like this:

AmericanOption('put', strike=100, volatility=0.4, 100, 0.02, 0.03, 0.5, engine='CrankNicolson')