Something wrong happened when use `MFP` to determine the best-fit model

[yanyew]

When I'm running iqtree -s A.trimal -m MFP -bb 1000 -bnni -pre A -st AA -redo -T AUTO, I got the error information as blow:

WARNING: Please only use GTR20 with very large data and always test for model fit! ERROR: checkpoint.h:216: bool Checkpoint::getArray(std::string, int, T) [with T = double; std::string = std::__cxx11::basic_string]: Assertion `next_pos == string::npos' failed. ERROR: STACK TRACE FOR DEBUGGING: ERROR: 1 funcAbort() ERROR: 2 () ERROR: 3 gsignal() ERROR: 4 abort() ERROR: 5 () ERROR: 6 () ERROR: 7 ModelProtein::restoreCheckpoint() ERROR: 8 ModelFactory::restoreCheckpoint() ERROR: 9 CandidateModel::evaluate[abi:cxx11](Params&, ModelCheckpoint&, ModelCheckpoint&, ModelsBlock, int&, int) ERROR: 10 CandidateModelSet::test(Params&, PhyloTree, ModelCheckpoint&, ModelsBlock, int, int, std::cxx11::basic_string<char, std::char_traits, std::allocator >, std::cxx11::basic_string<char, std::char_traits, std::allocator >, bool) ERROR: 11 runModelFinder(Params&, IQTree&, ModelCheckpoint&) ERROR: 12 startTreeReconstruction(Params&, IQTree&, ModelCheckpoint&) ERROR: 13 runPhyloAnalysis(Params&, Checkpoint, IQTree&, Alignment&) ERROR: 14 runPhyloAnalysis(Params&, Checkpoint*) ERROR: 15 main() ERROR: 16 __libc_start_main() ERROR: 17 () ERROR: ERROR: IQ-TREE CRASHES WITH SIGNAL ABORTED ERROR: For bug report please send to developers: ERROR: *** Log file: MYB_fulllength.log

What's the problem with it? Look forward to your reply. Thanks!