Experiencing a similar issue while importing hourly values for "Global on tilted plane" and "Array Temperature" Received an error that "the GIPMeas" data is undefined yet the data is in the file. Data is in 15 minute intervals, covers a full year and is in .CSV format. Using PVsyst version 6.75. I attempted to attached the .csv file but received error that "is not allowed". Thanks, Syd