When XMITADAPT includes 7 indicating TCPIP, Alchemist will dynamically allocate the required TCPIP datasets.
The proper way to configure the correct data/profile datasets is in the TCPIP started task procedure. (This is not specific to Alchemist.)
However, the same result can be achieved by defining DD SYSTCPD in the Alchemist started task procedure.
This is undocumented and may be used as a workaround.
//SYSTCPD DD DSN=TCPIP.&SYSNAME..TCPIP.DATA,DISP=SHR
This Frequently Asked Question applies to all supported releases of ESP Alchemist beginning with 5.*.