Error Handling: Event Study Calculators

The research apps of this website require certain input formats, which are described on the instruction pages and exemplified through the sample files available for download on the instruction page. If your data does not match the research apps´ input requirements, the event study calculators will prompt you error messages. 

As a general approach to overcome data file issues, please perform the following steps:

  1. Store your files as CSV files
  2. Open your CSV files in a text editor, such as Notepad
  3. Download the CSV sample files from the instructions page and open them in Notepad
  4. Perform a side-by-side comparison between your files and the sample files - in 98% of the cases, you will find the issue through this process

Please find in the below table guidance on several specific error messages you may find in the Analysis Report file.

ERROR CODE REASON(s) MITIGATION MEASURES
"Wrong number of columns"

Your files entail a column structure that differs from the required standard

  • Open CSV in a text editor and search for spare semicolons at the end of each line
  • Discard those semicolons/column delimiters
"Wrong number of columns"

You use an Apple computer that uses a different line delimiter in CSV files than regular Windows PCs - resulting in inflated column numbers

  • Upload your data in XLS or XLSX format
  • Use a Windows PC to save CSV files
"Application error" Your data is not consistent, e.g., IDs in your input files are not unique, you have duplicate entries
  • Review your data and fix inconsistencies
"Duplicate event id: 0" Your file format is likely not a standard CSV file, but, for example, a UTF8 CSV file
  • Transform your CSV file into a standard CSV file (i.e., store as file type "CSV (MS-DOS)" in Excel)
  • Alternatively, store and upload your data in XLS or XLSX format