您好，我想请问下计算最后出现这个错误，但是我已经把终止子删除了，这是什么情况呢？
5 columns are converted into ??? because of stop codons
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Sequences read..
Counting site patterns.. 0:05
169 patterns at 224 / 224 sites (100.0%), 0:05
2 ambiguous codons are seen in the data:
??? ---
Counting codons..
NG distances for seqs.:
1 2 3 4 5 6 7 8 9 10 11
440 bytes for distance
164944 bytes for conP
0 bytes for fhK
5000000 bytes for space
Species 0.9990?
D:\paml4.7\paml4.7\bin\codeml.exe -- killed
选择压力（dn/ds）计算dn/ds又叫ka/ks，具体的概念，意义百度上都有。现主要介绍最近用到的三种计算途径，分别是maga7，datamonkey，paml。 做选择压力分析的序列文件，需要先c...
