You can download this HotFix from TIBCO Support Portal (https://support.tibco.com). You will need to provide your TIBCO Support Portal credentials. Once logged in you can the download the hotfix by selecting the “Downloads” -> “Hotfixes” option. Then go to the AvailableDownloads/BusinessWorks/5.13.0/hotfix-13.

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Closed Issues in 5.13.0_HF-013 (This Release)

BW-17509
MTOM messages created from ActiveMatrix BusinessWorks did not include the
content transfer encoding header field.

BW-17507
The TransformXML activity resolved the wrong location for relative path resolutions
with xsl:include when the Saxon-B XSLT 2.0 transform technique was used.

BW-17365
The Receive Mail activity threw an exception when the content-disposition field
for Mime headers defined the filename for the attachments.

BW-16461
When the schema names were mapped to global variables in the JDBC Call Procedure
activity, the activity did not refer to the updated schema name when the
global variable values were updated at runtime.

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TIBCO ActiveMatrix BusinessWorks 5.13.0 Hotfix-13 is available

You can also download the hotfix using the below link:
https://support.tibco.com/s/hotfixes?id=a011a000009RxUGAA0