Mechanical APDL Basic Analysis Guide - Ansys

Chapter 21: Memory Management and Configuration
halves until it can allocate additional memory. If not specified, MEM_GROW defaults to one-half the initial
scratch space. To turn off dynamic memory allocation (use a fixed-memory model), set MEM_GROW=0.
LOCALFIL is a key that determines when files are to be closed: 0 (globally closed) or 1 (locally closed). It defaults
to 0 (globally closed) and can be changed at the Begin level with the /CONFIG,LOCFL command. This
key is applicable only to the EROT, ESAV, EMAT, FULL, and TRI files. Locally closed files (LOCALFIL=1) may
be deleted earlier during solution if requested with the /FDELE command. This may be helpful while running
large problems. Globally closed files are closed at the end of the run and are not opened and closed each
substep. This saves time in analyses with many substeps.
CONTACTS is the number of contact elements that are expected to be in contact at any given time. It defaults
to 1000 and can be changed at the Begin level with the /CONFIG,NCONT command. This is not the same as
the total number of contact elements in the model.
ORDERER_ is a key that determines the automatic element reordering scheme: 0 (WSORT,ALL), 1 (WAVES),
or 2 (both). It defaults to 2 and can be changed at the Begin level with the /CONFIG,ORDER command.
Any of the following nine keywords that you do not specify is set to 100 the first time ANSYS encounters it.
Whenever the current maximum is exceeded, the keyword value automatically doubles. The maximum values
are dynamically expanded, even at first encounter.
• MX_NODES is the maximum number of nodes. You can change the value (on most systems) at the Begin
level with the /CONFIG,MXND command.
• MX_ELEMS is the maximum number of elements. You can change the value (on most systems) at the
Begin level with the /CONFIG,MXEL command.
• MX_KEYPT is the maximum number of keypoints. You can change the value (on most systems) at the
Begin level with the /CONFIG,MXKP command.
• MX_LINES is the maximum number of lines. You can change the value (on most systems) at the Begin
level with the /CONFIG,MXLS command.
• MX_AREAS is the maximum number of areas. You can change the value (on most systems) at the Begin
level with the /CONFIG,MXAR command.
• MX_VOLUS is the maximum number of volumes. You can change the value (on most systems) at the
Begin level with the /CONFIG,MXVL command.
• MX_REALS is the maximum number of sets of real constants (element attributes). You can change the
value (on most systems) at the Begin level with the /CONFIG,MXRL command.
• MX_COUPS is the maximum number of sets of coupled degrees of freedom. You can change the value
(on most systems) at the Begin level with the /CONFIG,MXCP command.
• MX_CEQNS is the maximum number of constraint equations. You can change the value (on most systems)
at the Begin level with the /CONFIG,FMXCE command.
FILESPLT is the integer value indicating the file split point in megawords. A megaword is 1024*1024 4-byte
words, or 4 MB. All files that are eligible for splitting will be split into a new file every increment of xxxx
megawords (where xxxx is the value specified with this keyword). You can change the value (on most
systems) at the Begin level with the /CONFIG,FSPLIT command. See Splitting Files Across File Partitions in
the Operations Guide for more information on splitting files.
You can change many of the configuration settings at program start-up using ANSYS entry options, at the
Begin level with the /CONFIG command, or with other ANSYS commands. In most cases, therefore, there is
no need to create your own config130.ans file. Also, the default settings for each computer system have
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