Mechanical APDL Basic Analysis Guide - Ansys

Chapter 21: Memory Management and Configuration
The memory used by ANSYS resides within the system virtual memory. The required system virtual
memory for the amount of memory that you requested for either the workspace (-m) or database space
(-db) for ANSYS (via either the ANSYS command line or the configuration file) is not currently available.
Request less workspace or database space if possible and execute the ANSYS program again. If the initial
requested memory is required, then wait until sufficient system virtual memory is free and try again.
Another alternative is to increase the system's virtual memory (use the System icon in the Control Panel
on Windows).
Windows 32-bit systems are limited to a maximum workspace or database size of around 2 GB; however,
in practice, you often get less than that (e.g., 1400-1500 MB) due to system DLLs fragmenting the memory
address space available to ANSYS. This fragmentation decreases the size of the biggest contiguous block
of memory available to ANSYS. Thus, on Windows 32-bit systems, closing other programs to increase
the system virtual memory or increasing the system virtual memory manually will not resolve this error.
The only solution is to decrease the workspace or database size, or both.
The memory (-m) size requested cannot currently be addressed using dynamic memory mode. ANSYS
addressing can be changed by turning on fixed memory via the -f command line option.
This message may occur at ANSYS startup.
Include the -f command line option on the ANSYS execution command to remedy the problem.
For more information, see Memory Management and Configuration in the Basic Analysis Guide.
This model requires more scratch space than ANSYS can address in dynamic memory mode. ANSYS
addressing can be changed by turning on fixed memory via the -f command line option. Problem
terminated.
This message may occur while you are running ANSYS.
Include the -f command line option on the ANSYS execution command to remedy the problem.
For more information, see Memory Management and Configuration in the Basic Analysis Guide.
This model requires more scratch space than available, currently XX words (YY MB). The scratch space
may be increased by increasing the work space, currently XX words (YY MB), via the ANSYS command
line memory option. Problem terminated.
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This message may occur while you are running ANSYS.
If you are running ANSYS in dynamic memory mode and the internal calculations that ANSYS is trying
to perform cannot fit in the scratch space, the ANSYS program will attempt to allocate additional memory
to meet the requirements. However, this message may still appear if:
• Some portions of ANSYS cannot use the additional memory that was allocated or allocate the
memory when it is needed. The processing that ANSYS was trying to perform when this message
appeared took place in one of these portions.
• You used the -f command line switch so that ANSYS would use a fixed-mode memory addressing
scheme. Thus, no dynamic memory allocation is allowed.
If you receive this message, specify a higher -m value on the ANSYS execution command or change your
-f command line option and execute ANSYS again.
For more information, see Memory Management and Configuration in the Basic Analysis Guide.
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