A value of The Fund's past performance is not a good predictor of how the Fund will perform in the future. was reported for the concept oef:PerformancePastDoesNotIndicateFuture. This value has dimensions of oef:ClassAxis=cof:C000031655Member but this fact is not included in a dimensional table ( hypercube). All dimensional facts should be included in a hypercube.
The properties of this oef:PerformancePastDoesNotIndicateFuture fact are:
Period :2024-05-01 to 2025-04-30
Dimensions : oef:Cla...
What are data quality errors?
What are data quality errors?
Indicate areas that may not meet the standards set by the Data Quality Committee (DQC), and may reveal areas where the XBRL can be improved.
Concept AcctVal in oef/2024 used in 33 facts was deprecated in oef/2024 as of 2024-07-31 and should not be used.
WARNING
Submission type N-CSR/A should have a non-empty value for oef:ClassName in the context From2024-05-01to2025-04-30_C000031655Member_WithoutSalesLoadMember.
WARNING
1 fact(s) appearing in ix:hidden were eligible for transformation: dei:DocumentPeriodEndDate
What are possible issues?
What are possible issues?
Indicate areas of interest as to the quality of an XBRL formatted filing, and in some cases reveal opportunities for improvement of the XBRL filing.
