When rendering a shape with a gradient fill that contains 2 or more stops that are at the exact same fractional position, the rendering will fail with the following exception: User must specify at least 2 colors: java.lang.IllegalArgumentException java.lang.IllegalArgumentException: User must specify at least 2 colors at java.awt.MultipleGradientPaint.<init>(MultipleGradientPaint.java:169) at java.awt.LinearGradientPaint.<init>(LinearGradientPaint.java:286) at java.awt.LinearGradientPaint.<init>(LinearGradientPaint.java:244) at java.awt.LinearGradientPaint.<init>(LinearGradientPaint.java:211) at org.apache.poi.sl.draw.DrawPaint.lambda$createLinearGradientPaint$1(DrawPaint.java:548) at org.apache.poi.sl.draw.DrawPaint.safeFractions(DrawPaint.java:620) at org.apache.poi.sl.draw.DrawPaint.createLinearGradientPaint(DrawPaint.java:548) at org.apache.poi.sl.draw.DrawPaint.getGradientPaint(DrawPaint.java:244) at org.apache.poi.sl.draw.DrawPaint.getPaint(DrawPaint.java:167) at org.apache.poi.sl.draw.DrawPaint.getPaint(DrawPaint.java:157) at org.apache.poi.sl.draw.DrawSimpleShape.getFillPaint(DrawSimpleShape.java:144) at org.apache.poi.sl.draw.DrawSimpleShape.draw(DrawSimpleShape.java:70) at org.apache.poi.sl.draw.DrawSheet.draw(DrawSheet.java:71) at This issue is resolved by PR: https://github.com/apache/poi/pull/385
Thanks - I merged the PR