freemarker.core.InvalidReferenceException: The following has evaluated to null or missing: ==> bean[colName] [in template "front.ftl" at line 46, column 35] Tip: It's the final [] step that caused this error, not those before it. Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? FTL stack trace ("~" means nesting-related): - Failed at: ${bean[colName]} [in template "front.ftl" at line 46, column 33] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)

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    Stack Overflow | 4 months ago | murdoc1871
    freemarker.core.InvalidReferenceException: The following has evaluated to null or missing: ==> bean[colName] [in template "front.ftl" at line 46, column 35] Tip: It's the final [] step that caused this error, not those before it. Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? FTL stack trace ("~" means nesting-related): - Failed at: ${bean[colName]} [in template "front.ftl" at line 46, column 33] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
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    freemarker.core.InvalidReferenceException: Expression parameters.templateDir is undefined on line 23, column 15 in template/xhtml/form.ftl.
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    freemarker.core.InvalidReferenceException: Expression url.match is undefined on line 1, column 28 in test/alfwebtest01.get.html.ftl.

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    Root Cause Analysis

    1. freemarker.core.InvalidReferenceException

      The following has evaluated to null or missing: ==> bean[colName] [in template "front.ftl" at line 46, column 35] Tip: It's the final [] step that caused this error, not those before it. Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? FTL stack trace ("~" means nesting-related): - Failed at: ${bean[colName]} [in template "front.ftl" at line 46, column 33] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)

      at freemarker.core.EvalUtil.coerceModelToTextualCommon()
    2. FreeMarker
      DollarVariable.accept
      1. freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:451)
      2. freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:374)
      3. freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:96)
      4. freemarker.core.DollarVariable.accept(DollarVariable.java:59)
      4 frames