Modification of the sample exit's name generation table might be necessary to meet some unique need of your installation. You can change any or all of the entries. You can tailor the name generation table entries as follows:

• You can deactivate any entry so that the name generation function does not use the entry's data.
• You can modify the entry so that alternate characters are used to construct PU and LU names.
• You can add entries to the table.

Consider the following restrictions if you modify the name generation table:

• If you modify the table, reassemble the ISTEXCCS module and replace the current object file.
• Erroneous use of the duplication factor in the LU subentry can cause wrapping of the local address. That is, X'FF' wraps to X'00'.
• There are limits on the number of LU names the table can generate. These limits are not checked by the exit unless the number of LU resource entry blocks would cause overflow of the build vector.
• Make sure that your PU station address, if used, will not also be specified as an LU local address.
• Incorrect modification of labels and pointers can result in assembly or logic errors.
• It is advisable that you maintain the alphabetical order of the prefix characters.
• If the same block ID is coded in more than one entry in the table, the exit uses the first entry it finds with the block ID and ignores the remaining entries in the table that have that same block ID.