NullPointerException while fetching Histroy of a java file

Whenever I try to fetch History of a file or folder in clearcase project I get NullPointerException

Error in Event log - Problems while loading file history: java.lang.NullPointerException

system/log/idea.log

2019-03-06 17:52:59,374 [ 320684]   INFO - sourceforge.transparent.Runner - |cleartool ls -directory N:/vtm/dvp/java/AccessibleCategory.java  
2019-03-06 17:52:59,598 [ 320908]   INFO - sourceforge.transparent.Runner - |cleartool ls -directory N:/vtm/dvp/java/AccessibleCategory.java  
2019-03-06 17:53:08,600 [ 329910]   INFO - sourceforge.transparent.Runner - |cleartool lshistory -fmt 0
%d
1
%Fu
2
%e
3
%l
4
%n
5
%Nc
 N:/vtm/dvp/java/AccessibleCategory.java  
2019-03-06 17:53:09,298 [ 330608]   INFO - sourceforge.transparent.Runner - |cleartool ls -directory N:/vtm/dvp/java/AccessibleCategory.java

Seems like the clearcase lshistory command is not properly formed. -fmt format should be within quotes

Any pointer how this can be fixed?

Start by tracing the ClearCase history-fetch path that emits the cleartool lshistory command shown in the log, especially the command formatting around -fmt. Reproduce history loading for a file or folder in a ClearCase project, then verify that the command is formed correctly, the history loads, and the NullPointerException no longer occurs.