Limitations and Precautions for Display and Operations
The following describes limitations and precautions on screen display contents and operations.
1. Alternate Characters
Data for which a code conversion error has occurred in the Record Format View or Table Format View is displayed using the following alternate characters:
- Alphanumeric Item : "_" (underscore)
2. About the editing operation
- For the Record Format View, the Table Format View or when Edit of hexadecimal edit screen is performed, the cursor position is displayed. When you select a range of characters in a character string, the cursor position is displayed at the beginning of the range.
- When the length of an item exceeds the number of dislplay columns, the part that exceeds the display columns is shown on a new line. When this occurs, the cursor is positioned at the left side of the new line.
3. Indexed Organization File
- For an indexed file in which duplicate prime keys are allowed, storage order range extraction cannot be selected.
- Up to four alternate keys may be defined when created.
- The number of items that can be specified as keys when created conforms to the definitions in the Key Information Setting screen (less than 255 characters).
- If keys are allocated to signed numeric items, the records are in the order of absolute values.
- If a record format is changed and key items have non-matching relative positions and data lengths, a malfunction will occur.  The same rule applies if an item containing a key is changed using the Select Items function.
- You cannot edit the data of key items in indexed organization files using the Hexadecimal Edit bar.
4. When the code system of the line sequential organization treats the data file of Unicode
When a line sequential file contains Unicode:
- All item attributes must be National characters when treated as UCS2 code.
- All item attributes must be other than National characters when treated as UTF8 code.
5. Environment Settings
   Information file folder, work file folder, and backup file folder:
- Do not specify the root drive. Specify a subfolder.
- Use a file system that supports long file names.
- Use an absolute pathname, not a relative pathname, for the specification.
6. Undo
- Undo is disabled when another record is displayed or when a menu item is being executed.
- Undo is disabled if no data has been changed.
7. Changing the Font
- A character size from 6 through 26 can be set.
- The font color setting in the View > Font dialog box is ignored.
8. Hexadecimal Edit
- An item with the BIT attribute cannot be handled.
- The value may shift by the Limit of the SYSTEM for items that exceed 2000 bytes.
- The Cursor Placement on the Hexadecimal Edit Bar is displayed by the form of "Current position/Attribute length" (The Unit of Measure: Byte Count).
9. Data Converter Linkage
Common for Import and Export
- If the record format has a variable length, the Data Converter Linkage is disabled.
- The number of items that can be handled depends on the Data Converter specification.
Import
- The import of the data file form is not supported.
- This function is disabled if the user has selected display items using Select Items.
- This function is disabled if the file being edited has an indexed or relative organization.
- The code system of the CSV file should be ASCII.
Export
- An OCCURS clause is always expanded regardless of the setting of Show OCCURS Items in Select Items.
- Records to be output Include those deleted using "Delete Record".
10. Search
A code conversion error occurs with the data when the code system of the data file is EBCDIC, and Unicode is not correctly retrieved.
The following data items cannot be handled:
- Floating-point item (COMP-1, COMP-2, external floating-point item)
- Internal Boolean item (BIT)
The following character cannot be specified in search character strings:
- "_" (Underscore)
If the COPY clause and a data file have different record lengths, the following applies. The same rule also applies to the variable length record format.
If COPY clause record length < Data file record length The user cannot specify a data item corresponding to a relative position exceeding the data file record length (not displayed in the list of the Select Items dialog box).
If COPY clause record length < Data file record length The user cannot search the portion of data exceeding the COPY clause record length.
11. Search for Hexadecimal Data
Matching data that extends over two or more data items is not assumed to be a match.
The following data item cannot be handled:
   - Internal Boolean item (BIT)
   The following describes the specification used if the COPY clause and a data file have different record lengths. The same rule also applies to the variable length record format.
If COPY clause record length > Data file record length: The user cannot specify a data item corresponding to a relative position exceeding the data file record length (not displayed in the list of the Select Items dialog box).
If COPY clause record length < Data file record length: The user cannot search the portion of data exceeding the COPY clause record length.
12. Search, Search for Hexadecimal Data and Previous and Next
   The cursor is placed in a matching data item. Thus, the cursor is placed only once in a data item even though the data item contains multiple matching character strings and values.
13. Search Item Name
   The following describes the specification used if the COPY clause and a data file have different record lengths. The same rule also applies to the variable length record format.
If COPY clause record length > Data file record length: The user cannot specify a data item corresponding to a relative position exceeding the data file record length (not displayed in the list of the Select Items dialog box).
14. Extraction by specification of data condition
Up to ten data extraction conditions can be specified.
The items which cannot be specified for the data condition are:
- Floating-point item
- Internal Boolean item (BIT)
- External Boolean item
- Item not selected by Select Items (group item when Select Items is default)
- When the record length of the data file is longer than the record length of the format, an item located in the area where the record length of the data file is exceeded.
When the access method is a binary access, the data condition cannot be extracted.
15. Data Generation/Generat Item Values
- The number of characters that can be specified for the format is 128 bytes or less.
- The number of characters that can be specified for a start value and an end value is 128 bytes or less, including the comma. etc.
- The range of values that can be specified for an increment value is "-9" to "+9".
- Up to five digits can be specified for format %s and %S.
- Up to 18  digits can be specified for format %D and %U.
- Up to 3 fixed parts can be specified for an alphanumeric character. The limitation is not in the variable part.
- For each format definition, only one fixed part and one variable part can be specified.
- Up to 100 formats can be specified.
The items which cannot be processed by Data Generation/Generate Item Values are the following:
- Pointer item
- Floating-point item
- Boolean item
- N item
- Relative record number of relative organization
- Item not selected by Select Items (Group item when Select Items is default)
- When the record length of the format is longer than the record length of the data file, an item located in the area where the record length of the data file is exceeded.
16. Table Format View
   To confirm a value entered in an item, move the cursor or press the Enter key.
   Performing any other processing before confirming your input discards the input data.
17. Replace
The limitation and precautions concerning the retrieval apply correspondingly to "10. Search".
- The length of the retrieval character and the replacement character is assumed to be the same. It is an error for "Retrieval Character" < "Replace Character", or "Retrieval Character" > "Replace Character"
- When the retrieval substitution for the character string is executed, check the attribute of the item of the retrieval character string and the replacement character string.
- The Replacement processing of the key item of an indexed or relative organization is not done.
- The replace function only works for data of X items (alphanumeric characters) or N items (national characters).
18. Replace the hexadecimal data
The limitation and precautions concerning the retrieval apply correspondingly to "11. Search for Hexadecimal Data".
- The length of the retrieval character and the replacement character is assumed to be the same. It is an error for Retrieval Character < Replace Character, or Retrieval Character > Replace Character.
- When the hexadecimal retrieval replacement is executed, if the input data causes a code conversion error by the replacement character string, it will not be done because of the error.
- The Replacement processing to the key item of an indexed or relative organization is not done.
- The replace function only works for data of X items (alphanumeric characters) or N items (national characters).