Function errors/warnings/messages
Contents
Perform cross-section calculations (material non-linear analysis)
Function ready condition: - if input data table SECTION is tested.
Function error condition: 3 error conditions, 1 severe warning condition, 9 warning conditions, 6 messages.
Data missing, recalculate from DF5.
Internal data calculated in design function 5 can not be found. Please set back design function 5 and recalculate from there.
(This error can occur after updating a project from a previous version of the program. If only design function 6 is recalculated after the update, not all required data might be present.)
Num of cross-sec. limited to 'number'
The number of elements mentioned in the SECTION table is limited to 'number', even if individual elements are mentioned more than once in the table (i.e. the number of actual elements to be calculated may be less than the limit).
Please note that the limit for the educational version is 50 elements.
No solution for stress calc csline 'number'
The iteration process does not converge during the stress calculation for a cross-section.
'number' = line number of tables CSGEN and CSLOAD
(The element in question is unstable, the element load is too high. Other elements may be calculated after removing this element from table SECTION.)
Stresses in mitre/tee-element 'number' exceed yield stress (mitrebends/tees can only be calculated with material-linear behaviour).
The equivalent stress in the mitre or tee element exceeds the yield stress, while using the non-linear material model option.
Ovalisation is 'value' % of diameter
The ovalisation of an element exceeds 10% of the diameter.
(An ovalisation exceeding 10% is considered to be very large.)
Elements with and without top load
In table SECTION some elements have a TOPLOAD 'Yes' indicator, some a 'No' indicator.
(Having top loads assigned in table TOPLOAD it is advised to have the same indicator on each input line. Especially when the Ovalising Section Model combined with the Allowed Ovalisation Redistribution is selected in design function 1. When all input lines have a 'Yes' indicator (also in those pipeline parts where no top load is present) a correct redistribution will be performed.
'number1' out of 'number2' elm. not calc ('number')
Not all elements (number1) out of the total amount of elements (number2) are calculated. Between brackets the first not calculated element.
Axial buckling strain > critical one
The calculated maximum axial buckling strain is greater than the critical buckling strain.
(The values are reported in output tables RLDSPLC and RLDPLMX.)
Axial torsion strain > critical one
The calculated maximum axial torsion strain is greater than the critical torsion strain.
Did not pass axial buckling check
Did not pass axial buckling check from NEN:
Equivalent strain exceeds check strain
The calculated maximum total equivalent strain is greater than the check strain CHKEPS specified in table SIGEPS.
(The values are reported in output tables CEPS and CEPSM.)
External pressure strain > critical one
The calculated maximum strain due to external pressure is greater than the critical strain.
(The values are reported in output tables RLDSPLC and RLDPLMX The influence of the soil is taken into account.)
Elem 'number', incorrect result during oval calc
A numerical instability has occurred during the calculation of the ovalisation. Therefore the stress and strain results might be inaccurate.
Try to use ovalisation redistribution in DF5.)
Weak/joint element(s) not calculated
Only WEAK elements have been specified in (a row of) table SECTION.
No elements calculated
Only WEAK elements have been specified in table SECTION.
All elements already calculated
All pipeline cross-sections specified in table SECTION are already calculated including the detailed stresses of the last specified element in table SECTION.
Topload = 0.
The TOPLOAD indicator in table SECTION has been set to YES and (the TOPLOAD-value = 0. and the Loading Redistribution option is OFF or no table TOPLOAD exists).
•in output table CSLOAD the relevant TOPLOAD-value will become indicated 0. or UNDEFINED if no table TOPLOAD exists.
elem 'number', diff. oval angle: 'value'
The ovalisation angle in DF6.2 is different from the angle found DF6.1.
(Probably something went wrong in the iteration process of DF6.2, therefore the stress and strain results might be inaccurate.
Try to use ovalisation redistribution in DF5.)
Adj of SIX of el 'number' stopped at 100 it
Adjustment of SIX (stress intensification factor in axial direction) ended after 100 iterations.
(This is usually not a problem, the calculated value should still be close to the actual value.)
H6224 (last modified: Feb 24, 2026)
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