SCIP列生成报错：定价终止但无法创建分支问题求助

我基于SCIP的定价回调实现了**松弛/连续多商品流（类似线上VRP示例）**的列生成程序：

• 当有新变量生成时，程序运行完全正常；
• 但当定价回调返回0个新变量时，求解器直接崩溃，核心报错为：

ERROR: pricing was aborted, but no branching could be created!

注：所有变量均为连续型，我未尝试任何分支操作。

每次调用scip_redcost函数时，我会在返回SCIP_OKAY前打印新增变量数，测试示例的运行日志如下：

time | node  | left  |LP iter|LP it/n|mem/heur|mdpt |vars |cons |rows |cuts |sepa|confs|strbr|  dualbound   | primalbound  |  gap   | compl.
t 0.0s|     1 |     0 |     0 |     - | trivial|   0 |  23 |  43 |   0 |   0 |  0 |   0 |   0 |      --      | 4.020402e+07 |    Inf | unknown
* 0.0s|     1 |     0 |     3 |     - |    LP  |   0 |  23 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 4.020402e+02 |    Inf | unknown
Pricing ends with 3 new variable.
  0.0s|     1 |     0 |    12 |     - |   746k |   0 |  26 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 4.020402e+02 |    Inf | unknown
r 0.0s|     1 |     0 |    12 |     - |simplero|   0 |  26 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 6.100000e+01 |    Inf | unknown
Pricing ends with 2 new variable.
  0.0s|     1 |     0 |    18 |     - |   748k |   0 |  28 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 6.100000e+01 |    Inf | unknown
r 0.0s|     1 |     0 |    18 |     - |simplero|   0 |  28 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 1.500000e+01 |    Inf | unknown
Pricing ends with 1 new variable.
  0.0s|     1 |     0 |    19 |     - |   748k |   0 |  29 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 1.500000e+01 |    Inf | unknown
Pricing ends with 2 new variable.
  0.0s|     1 |     0 |    20 |     - |   749k |   0 |  31 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 1.500000e+01 |    Inf | unknown
r 0.0s|     1 |     0 |    20 |     - |simplero|   0 |  31 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 1.450000e+01 |    Inf | unknown
Pricing ends with 0 new variable.
  0.0s|     1 |     0 |    20 |     - |   751k |   0 |  31 |  43 |  43 |   0 |  0 |   0 |   0 |      --      | 1.450000e+01 |    Inf | unknown
[solve.c:4561] ERROR: pricing was aborted, but no branching could be created!
[solve.c:4994] ERROR: Error <-10> in function call
[scip_solve.c:2789] ERROR: Error <-10> in function call
terminate called after throwing an instance of 'SCIPException'
  what():  method returned an invalid result code
Aborted (core dumped)

目前已知：

• 对偶边界14.5是预期的最优最小值，已生成的列可以组合出最优解；
• 在定价回调中将当前问题导出为.lp文件并单独求解，能正常得到预期结果。

现在因为问题出在SCIP内部不可见的代码区域，无法定位原因，求有相关经验或对SCIP列生成逻辑熟悉的人提供排查思路。

内容的提问来源于stack exchange，提问作者user2485450