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Support Article

UnresolvedAssemblyError occurs when launching Tracer



UnresolvedAssemblyError occurs when launching the Tracer and the User portal actions do not work.

Error Messages

For the Tracer: Method "Show-HTML" (class "com.pega.pegarules.exec.internal.rules.methods.MethodShowHtml") is not recognized
at com.pega.pegarules.priv.FUAUtil.throwUnresolvedAssemblyError(
at com.pegarules.generated.activity.ra_action_traceroptionsavailable_6e8d47dfde60993d803585bbc448bd74.step17_circum0(

For the Portal: Method "Property-Set-Special" (class "com.pega.pegarules.exec.internal.rules.methods.MethodPropertySetSpecial") is not recognized
at com.pega.pegarules.priv.FUAUtil.throwUnresolvedAssemblyError(
at com.pegarules.generated.activity.ra_action_showselectedportal_5ac992779948321a9cb7a20d813ff9e2.step3_circum0(

Steps to Reproduce


Root Cause

A defect or configuration issue in the operating environment.

When the ShowSelectedPortal and TracerOptionsAvailable activities were originally assembled, database connection issues occurred. Hence, the MethodShowHtml and MethodPropertySetSpecial classes were not read from the database. Therefore, the activity rules were incorrectly assembled.


Perform the following local-change: Force recompile the two activity rules by following the below steps:
  1. Navigate to the System Management Application (SMA) > Advanced > Virtual Rule Table Cache Management.
  2. Enter the following values in the below fields:
    Rule Class: Rule-Obj-Activity
    Instance Name: !TracerOptionsAvailable
  3. Click the 'Lookup Virtual Table Cache Detail' button to lookup the activity.
  4. Click the 'Reassemble Candidates' button
  5. Perform the same steps for Rule-Obj-Activity!ShowSelectedPortal.

Published April 27, 2018 - Updated October 8, 2020

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