The program performs most arithmetic with 15 digits of accuracy. When elements with significantly different stiffnesses are connected to a common joint, some digits of accuracy may be lost (for the element with smaller stiffness). Another example would be using rigid diaphragm assumption together with flexible elements, local or global instabilities, etc. The program provides the following messages based on the number lost digits of accuracy:
- Less than 6 digits lost: When the program suspects that less than 6 digits of accuracy will be lost during solution it does not give any messages.
- Between 6 to 11 digits lost is reported as a warning: The results of the analysis may still be acceptable but the user should carefully check the results, especially the global sums of loads.
- Above 11 digits lost results in the analysis being terminated with an error message because the results may not be sufficient accurate. The model should be revised.