Titanic Example - R-Apriori

Hey,

I would like to analyze some Data from a Titanic Example. First of all, I loaded the data into SAP Predictive Analyses. Afterwards I filtered out some needless Data (e.g. Age = NA).

Then I selected the R-Apriori Algorithm. I made some settings, and run the analysis. After I ran the analysis, I got the following error.

An error occurred while executing commands in the R environment.Error from R:

"Error in asMethod(object) :

  column(s) 5 not logical or a factor. Use as.factor or categorize first.

"

Does somebody now this error?