{"id":4357,"date":"2019-06-17T08:26:13","date_gmt":"2019-06-17T08:26:13","guid":{"rendered":"http:\/\/buildsoftsupport.com\/?post_type=ht_kb&p=4357"},"modified":"2026-06-09T15:10:28","modified_gmt":"2026-06-09T15:10:28","slug":"error-no-convergence-after-50-iterations","status":"publish","type":"ht_kb","link":"https:\/\/support.buildsoft.eu\/nl\/knowledge-base\/error-no-convergence-after-50-iterations\/","title":{"rendered":"Error: No convergence after 50 iterations"},"content":{"rendered":"

During the elastic analysis, you get the error:<\/p>\n

\"\"<\/p>\n

The error means Diamonds failed to reduct the applied loads to the foundation, because it was impossible to meet all the imposed nonlinear boundary conditions.<\/p>\n

Solution<\/h2>\n

Since there are a lot of nonlinearies possible in Diamonds, there is not just one solution. To eliminate the error message, you should:<\/p>\n

    \n
  1. Check if the message can be neglected
    \n \t\t
    \r\n \t\t\t
    When can the message be neglected<\/div>\r\n \t\t\t
    \r\n \t\t\t\t
    \r\n \t\t\t\t\t

    You can neglect the message, if it only appears for loads cases other than self-weight, while the combinations ULS, SLS calculate just fine.\"\"Why:\u00a0<\/strong>In some cases it is logical that the structure doesn’t calculate. However, the self-weight must always calculate!<\/p>\n\n\n\n\n
    Example 1: frame, supports cannot bear tension, wind loads<\/p>\n

    \"\"<\/td>\n

    		Example 2: plate, soil cannot bear tension, upward water pressure<\/p>\n

    \"\"<\/td>\n<\/tr>\n

    The wind loads will result in a tensile reaction in the left support, compressive reaction in the right support. But none of the supports could bear tension > error for the load case ‘wind’.<\/span><\/p>\n

    In a combination the tensile reaction due to the wind loads, will be compensated by a compressive reaction resulting from for example self-weight and dead loads > no error for the combination.<\/span><\/td>\n

    		The upward water pressure will result in a tensile reaction in the soil. But the soil could not bear tension > error for the load case ‘water pressure’.<\/span><\/p>\n

    In a combination the tensile reaction due to the water pressure, will be compensated by a compressive reaction resulting from for example self-weight and dead loads > no error for the combination.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Fix:\u00a0<\/strong>The message will be gone if\u00a0you don’t create the combinations for the load cases.<\/p>\n