Error in exporting data from power bi to csv file using R

I am trying to export data from power bi to csv file using R

I am giving the below command

write.csv(ALL_Data, "C:\\Users\\username\\Documents\\folder 1\\folder 2\\folder 3\\folder 4\\filename.csv")

I am getting the below error please help

DataSource.Error: ADO.NET: R script error.
Error in is.data.frame(x) : object 'ALL_Data' not found
Calls: write.csv ... eval.parent -> eval -> eval -> write.table -> is.data.frame
Execution halted

Details:
    DataSourceKind=R
    DataSourcePath=R
    Message=R script error.
Error in is.data.frame(x) : object 'ALL_Data' not found
Calls: write.csv ... eval.parent -> eval -> eval -> write.table -> is.data.frame