Abstract: A method for automatically detecting an attempted invalid access to a memory address in accordance with an exemplary embodiment is provided. The method includes reading a first data set having a software application name and a memory address stored therein utilizing the mainframe computer. The memory address indicates a portion of a memory that is not allowed to be changed. The method further includes detecting when a software application is attempting to access the memory address and setting a first bit in the memory to a first value in response to the detection utilizing the mainframe computer. The method further includes storing a name of the software application, the memory address, and contents of the portion of the memory specified by the memory address, in a second data set, when the first bit has the first value utilizing the mainframe computer. The method further includes displaying an error message on a display device when the first bit has the first value.

Abstract: A system for overriding retail transactions. In response to receiving an input to override a retail transaction, it is determined whether data on an RFID card has been read. The data is read by an RFID reader located on a POS device keyboard. In response to determining that the data has been read, a light emitting diode is used to indicate that the data has been read. Then, the data is sent to a central computer to validate that a user of the RFID card is authorized to perform the override. In response to receiving a validation result from the central computer, it is determined whether the user of the RFID card is authorized to perform the override. Then, in response to determining that the user of the RFID card is authorized to perform the override, the user of the RFID card is permitted to complete the retail transaction override.

Abstract: A method for automatically detecting an attempted invalid access to a memory address in accordance with an exemplary embodiment is provided. The method includes reading a first data set having a software application name and a memory address stored therein utilizing the mainframe computer. The memory address indicates a portion of a memory that is not allowed to be changed. The method further includes detecting when a software application is attempting to access the memory address and setting a first bit in the memory to a first value in response to the detection utilizing the mainframe computer. The method further includes storing a name of the software application, the memory address, and contents of the portion of the memory specified by the memory address, in a second data set, when the first bit has the first value utilizing the mainframe computer. The method further includes displaying an error message on a display device when the first bit has the first value.