Article ID: 215591 - View products that this article applies to.
This article was previously published under Q215591
For a Microsoft Excel for Windows version of this article, see 323626
When you try to open a text or comma separated variable (CSV) file, you receive the following error message:
SYLK: File format is not valid
This problem occurs when you open a text or CSV file and the first two characters of the file are the letters ID (uppercase). For example, the text file may contain the following text:
Note This problem does not occur if the first two characters are lowercase (id).
ID, STATUS 123, open 456, closed
To open your file in Microsoft Excel, first open the file in a text editor and insert an apostrophe at the beginning of the first line of text.
How to Insert an ApostropheTo add an apostrophe to the beginning of the first line of text in your file, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
A SYLK file is a text file that begins with "ID" or "ID_xxxx", where xxxx is a text string. The first record of a SYLK file is the ID_Number record. When Excel identifies this text at the beginning of a text file, it interprets the file as being a SYLK file. Excel attempts to convert the file from the SYLK format, but is unable to because there are no valid SYLK codes following the "ID" characters. Because it cannot convert the file, Excel generates the error.