GlideExcelParser does not work for files larger than 5MbIssue The GlideExcelParser API allows users to parse xlsx records into Javascript objects. It has an internal file size limit of 5Mb.ResolutionTo increase the default limit, please add the following (integer) property to your instance and set the size to > 5Mb (in bytes) glide.scriptable.excel.max_file_size Example (10Mb)