diff --git a/src/data/streams/aware_csv/container.R b/src/data/streams/aware_csv/container.R
index 90b910e4..1863550a 100644
--- a/src/data/streams/aware_csv/container.R
+++ b/src/data/streams/aware_csv/container.R
@@ -57,7 +57,7 @@ pull_data <- function(stream_parameters, device, sensor, sensor_container, colum
   data_file <- file.path(stream_parameters$FOLDER, sensor_container)
 
   if(!file.exists(data_file))
-    stop("The data container should be a CSV file but it does not exist: ", data_file)
+    stop("The CSV file with ",sensor," data does not exist: '", data_file, "'. In config.yaml, configure [",sensor,"][CONTAINER] with the name of your CSV file including its '.csv' extension (you set the folder name in [PHONE_DATA_STREAMS][aware_csv]")
 
   if(!endsWith(data_file, ".csv"))
     stop("The data container should be a CSV file: ", data_file)