And Chat GPT says:
CSV files containing the null character 00h are files in the CSV (Comma-Separated Values) format that include the null character (00h), which is a representation of the null or NULL character in hexadecimal notation. The null character is a control character with a binary value of 00000000. It is not a standard part of CSV files and may be introduced due to encoding or data manipulation errors. These null characters can cause issues when processing or interpreting the data because they do not conform to the standard structure of a CSV file.
Therefore, it's important for CSV files to follow a standard format and not contain null characters or other unexpected characters to ensure proper processing by applications that work with tabular data. If you encounter CSV files containing null characters, you may need to clean or correct these files before processing them to avoid interpretation and data manipulation problems.