**Syntax**

` > PARAMETER`

**Parent Command**

` -`

**Subcommand**

` >> NUMBER OF TIMES: maxtim
>> NUMBER OF PARAMETERS: main
>> NUMBER OF OBSERVATIONS: main
>> NUMBER OF PEST OBSERVATIONS: maxpestobs
>> NUMBER OF DATA SETS: maxo
>> NUMBER OF DATA POINTS: maxpd
>> NUMBER OF REGULARIZATION TERMS: maxreg
>> NUMBER OF RESTARTS: maxbrk
>> NUMBER OF MAXEBRK: maxebrk
>> NUMBER OF MAXR: max`

**Description**

In iTOUGH2, memory for (almost) all arrays is dynamically allocated. The size of the arrays holding basic input variables is either automatically determined or set to reasonably high values. Should this size be exceeded, the user is prompted to provide the maximum dimension for such arrays using second-level commands of command `> DIMENSION`, which must be the first command before any other first-level command. The table shows the second-level commands and their meaning.

Second-Level Command | Dimension |
---|---|

NUMBER OF TIMES: maxim |
Total of all points in time, including calibration times, printout times, restart times |

NUMBER OF RESTARTS: maxbrk |
Restart times |

MAXEBRK: maxebrk |
Number of elements or materials which changed conditions after restart |

NUMBER OF PARAMETERS: maxn |
Number of parameters to be varied or estimated by iTOUGH2 (including inactive parameters) |

NUMBER OF OBSERVATIONS: maxm |
Total number of observations |

NUMBER OF PEST OBSERVATIONS: maxpestobs |
Total number of PEST observations |

NUMBER OF REGULARIZATION TERMS: maxreg |
Total number of regularization terms |

MAXR: maxr |
Number of multiple entries (materials, elements, indices, etc.) on iTOUGH2 command lines |

NUMBER OF DATA SETS: maxo |
Number of data sets (usually points in space where calibration data are available) |

NUMBER OF DATA POINTS: maxpd |
Maximum number of measured data points per data set |

Parameter statements related to the dimensions TOUGH2-related arrays are specified in the TOUGH2 input file in block `DIMEN`.

**Example**

`> DIMENSION
>> NUMBER OF TIMES: 2000
>> NUMBER OF PARAMETERS: 75
>> MAXR: 230
<<
`

**See Also**

` > OBSERVATION | > PARAMETER | > COMPUTATION
`