In the example of the BEAMnrc simulation in Part 7 of the exercise tutorial, an error occurred indicating that the SYNCJAWS position data file could not be opened.

[aam693]

报错：SYNCJAWS position data file could not be opened
导致后面的散点图是空白，同样提示所读取的模拟后的相空间是空白的

[rtownson]

Did you do this section? Make sure you place the file in $EGS_HOME/BEAM_syncjaws.

Create a new text file, that will provide the dynamic motion of the jaws. There are examples
for all of the syncronized CMs in $HEN_HOUSE/omega/beamnrc/CMs/sample_sequences/.
Copy the text at the end of this section and save the file as example.sequence in
$EGS_HOME/BEAM_syncjaws . Now go back to the settings of the SYNCJAWS CM, click the
Browse button and select the file (make sure the mode is set to Dynamic ).