X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Frobot%2Fperformance%2Fperformance_vars.robot;h=4f2cc50fa354af6c4632b79183da80574d2f9bcc;hp=9fff489279fdca07e2e088e34c0534ee68174616;hb=46f0194afb8d4c8191b3c412332e3fbb92528c19;hpb=e75e2f7a9b2fa73718f8a4a5a31fbe56b234f820

diff --git a/resources/libraries/robot/performance/performance_vars.robot b/resources/libraries/robot/performance/performance_vars.robot
index 9fff489279..4f2cc50fa3 100644
--- a/resources/libraries/robot/performance/performance_vars.robot
+++ b/resources/libraries/robot/performance/performance_vars.robot
@@ -514,7 +514,8 @@
 | | ... | Set Variable | ${353.83333}
 | | ... | ELSE
 | | ... | Convert To Number | ${frame_size}
-| | ${avg_frame_size} = | Evaluate | $bare_avg_frame_size + $max_overhead
+| | # Do not use $max_overhead (without braces), that does not tolerate string.
+| | ${avg_frame_size} = | Evaluate | ${bare_avg_frame_size} + ${max_overhead}
 | | Set Test Variable | \${avg_frame_size}
 | | ${bare_max_frame_size} = | Run Keyword If | '${frame_size}' == 'IMIX_v4_1'
 | | ... | Set Variable | ${1518}