I believe the Open Interest header is supposed to be <o/i> per the ASCII File Layout topic below:
In order for an ASCII source file to convert properly, the file must be arranged correctly. This section explains the proper alignment.
The data in the ASCII file should be arranged as shown below.
<ticker>, <per>, <date>, <time>, <open>, <high>, <low>, <close>, <vol>, <o/i>
An ASCII source file can also contain a <name> field. This is helpful if your destination file is in the MetaStock format and you want the name of MetaStock file to be different than the ticker symbol . If you choose to include a <name> field in your ASCII file, you must define a header line, otherwise the conversion will fail. The following header line is an example.
<ticker>, <name>, <per>, <date>, <close>, <vol>
<ticker> The ticker symbol of the security. The ticker symbol is used to determine which MetaStock data file to post the data to. The ticker symbol (if you choose to specify it in the ASCII file) must be included on every line of data.
If the ticker symbol in the ASCII file does not match a ticker symbol in the MetaStock data files, you will be asked if you want to create a new MetaStock data file.
If the ticker symbol in the ASCII file includes a space, a comma-delimited header line must be created at the top of the ASCII file (see ASCII Source File Layout on how to create a header line). The header line allows the file to be processed using only commas as delimiter characters.
The ticker field can be omitted, but only if the <per> field is also omitted. If the ticker symbol is omitted, you are prompted to supply the ticker symbol (see Ticker Symbol Dialog).
<per> The periodicity of the data (e.g., Intraday, Daily, Weekly, Monthly, or Yearly).
If this field is omitted, the periodicity selected in the Conversion Options dialog is used (see Conversion Options Dialog).
<date> The date of the data contained on the line of the ASCII file. Each line of the ASCII file must have a date. The date can be in either the yyyymmdd or mm/dd/yyyy formats (e.g., 19891222 or 12/22/1989), and can use either 2-digit or 4-digit years.
When using 2-digit years in Windows 95 or Windows NT 4.0, The DownLoader will assume any number preceding "30" should begin with "20", years "30" and higher will begin with "19." When using 2-digit years in Windows 98 or Windows 2000, The DownLoader will use the Regional Settings found in your Windows Control Panel.
The dates must be in ascending order (i.e., most recent date is listed on the last line).
If the dates in the ASCII file precede the dates in the existing MetaStock file (i.e., the file you are appending to), the data will be ignored.
<time>. The time of the data contained on the line of the ASCII file. This field should only be used if the ASCII file contains intraday price data (i.e., the periodicity is intraday). The time should be entered using a 24 hour clock (e.g., 3:30 PM = 15:30).
<open> The opening price of the security. The open field can be omitted if the open interest (<o/i>) field is also omitted.
<high> The high price for this date.
<low> The low price for this date.
<close> The closing (last) price for this date.
<vol> The volume for this date.
<o/i> The open interest for this date. The open interest field can be omitted if the open (<open>) field is also omitted.
EXAMPLE INPUT:
IBM,D,7/29/86,121,122.375,120.500,121.75,624589,0 IBM,D,7/30/86,123.375,123.125,122.5,122.75,431234,0
MOB,D,7/29/86,28.25,29.5,27.125,28,12627,0
MOB,D,7/30/86,30,30.625,29.875,30.375,7588,0
Because the <open> and <o/i> fields are optional, this data also could be arranged as shown below.
IBM,D,7/29/86,122.375,120.500,121.75,624589
IBM,D,7/30/86,123.125,122.5,122.75,431234
MOB,D,7/29/86,29.5,27.125,28,12627
MOB,D,7/30/86,30.625,29.875,30.375,7588
If all the data in the ASCII file is for one security only, then the <ticker> and <per> fields can be omitted. The data can be arranged as shown below. You will be prompted for the ticker symbol.
7/27/96,41.375,40.5,40.75,524589
7/38/96,42.5,40.5,41.75,345679
7/29/96,42.375,41.125,41.75,678967
7/30/96,43.625,42.500,43.125,564479
If all the data in the ASCII file is for one security only, then the <ticker> ,<per>,<high>,<low>, and <vol> fields can be omitted. The data can be arranged as shown below. You will be prompted for the ticker symbol.
7/27/96,40.75
7/38/96,41.75
7/29/96,41.75
7/30/96,43.125
In the resulting MetaStock files, the other price fields will be automatically filled with the close values. The volume fields will be filled with zeros.
A header line can be placed at the top of the ASCII file to specify the arrangement of the data. This allows you to arrange the data in any order you wish. The line below shows volume appearing before the price fields.
<date>,<vol>,<high>,<low>,<close>
7/29/86,624589,122.375,120.500,121.75
7/30/86,431234,123.125,122.5,122.75
7/29/86,12627,29.5,27.125,28
7/30/86,7588,30.625,29.875,30.375